Overview

The first half of 2026 has been defined by the most consequential geopolitical shock in decades: the United States and Israel launched a joint military campaign against Iran, triggering a cascade of economic disruptions that have fundamentally altered the global interest rate landscape. On February 28, 2026, Operation Epic Fury (U.S.) and Operation Roaring Lion (Israel) commenced with airstrikes that killed Iran’s Supreme Leader Ayatollah Ali Khamenei and senior military commanders [1]. Iran retaliated by firing over 8,000 missiles and drones across the Gulf region and, critically, closed the Strait of Hormuz—the world’s most vital oil chokepoint, through which roughly 15 million barrels per day of crude oil flowed before the conflict [2]. The resulting energy supply shock sent Brent crude briefly above $126 per barrel, pushed U.S. headline inflation to 4.2% in May 2026, and forced central banks worldwide to abandon plans for monetary easing [3][4].

Although a ceasefire took effect on April 8, 2026, and a 14-point Memorandum of Understanding signed on June 17 partially reopened the Strait, the damage to inflation expectations, fiscal trajectories, and bond market dynamics has been profound. As of early July 2026, the Federal Reserve’s benchmark rate remains at 3.50%–3.75%, markets are pricing a two-thirds probability of a rate hike by September, and the six-month Treasury yield has surged to 4%—35 basis points above the effective federal funds rate—signaling that the bond market expects multiple rate increases [5][6]. This report examines the transmission mechanism from war-driven inflation to higher global interest rates, assesses the implications for Federal Reserve policy, and evaluates the resulting winners and losers across U.S. equity sectors and asset classes.

The Transmission Mechanism: From War to Higher Global Interest Rates

The Strait of Hormuz Closure and the Oil Shock

The immediate and most powerful transmission channel from the conflict to global interest rates was the disruption of oil supply. Iran’s closure of the Strait of Hormuz on February 29, 2026, created the largest energy supply disruption on record, removing approximately 10.1 million barrels per day from global markets in March alone [2][7]. OPEC+ production collapsed from 42.77 million barrels per day in February to 33.13 million bpd by May, and massive stock draws of 430 million barrels occurred within weeks [8][9].

The oil price trajectory was violent. Entering 2026, Brent crude traded near $60 per barrel and WTI near $57, with the IEA forecasting a supply overhang of nearly 4 million bpd [2]. By late January, as tensions escalated, prices had risen roughly 15% to above $70 and $65 respectively. After the February 28–29 airstrikes and Strait closure, Brent briefly crossed $126 per barrel and WTI nearly reached $120—roughly double pre-war levels [2]. This energy price shock fed directly into headline inflation measures. The May 2026 Consumer Price Index showed annual inflation at 4.2%, the highest since April 2023, with energy prices accounting for 60% of the month-over-month increase [3][4]. The Personal Consumption Expenditures (PCE) index, the Fed’s preferred metric, rose to 4.1% year-over-year, while core PCE climbed to 3.4% [10].

Crucially, the inflationary impulse has not fully receded even as oil prices have fallen. By early July 2026, Brent traded near $72 per barrel and WTI near $70—roughly pre-war levels—yet gasoline prices remained 19% above pre-invasion levels at $3.20 per gallon, and diesel was 30% higher at $4.80 per gallon [11]. The IEA has labeled the situation the “biggest energy crisis in history,” and OECD commercial inventories are projected to fall to an all-time low of 50 days of demand by December 2026 [11]. The U.S. Strategic Petroleum Reserve is at its lowest since May 1983, leaving no margin for further supply shocks [11]. This persistent energy cost overhang has kept inflation expectations elevated, directly feeding into higher bond yields.

Commodity Price Spikes and Supply Chain Disruptions

Beyond oil, the conflict disrupted critical commodity flows. Before the war, roughly one-third of the world’s seaborne fertilizer passed through the Strait of Hormuz, and the closure caused a global shortage of natural gas, a key input for nitrogen fertilizer [12]. U.S. farmers faced sharply higher prices: 70% of respondents to an American Farm Bureau Federation survey said they could not afford all the fertilizer they needed, and half of corn growers planned to reduce application [12]. The USDA projects corn acreage dropping from 98.8 million to 95.3 million acres, while soybean acreage (which requires less nitrogen) is expected to rise from 81.2 million to 85.4 million acres [12]. The FAO Food Price Index averaged 130.3 points in June 2026, 2.2% higher year-on-year, with the Meat Price Index reaching a new record high [13].

Shipping disruptions compounded the problem. Houthi attacks on Red Sea shipping, which began in 2023, intensified after the U.S.-Israel operations, and on July 5, 2026, a cargo ship was attacked 30 nautical miles southwest of Hodeida, Yemen [14]. Rerouting via the Cape of Good Hope adds 10 to 14 days and significantly increases fuel costs. Spot rates on China-to-U.S. West Coast routes have increased 37%, driven by congestion spreading from Middle East disruptions to Asian hubs [15]. War-risk insurance premiums have climbed sharply, and some coverage has been reduced or canceled [15]. These supply-side cost pressures have broadened the inflation impulse beyond energy, embedding it into food, manufactured goods, and construction materials—cumulative material costs are now 40% above 2020 baselines [16].

Defense Spending and Fiscal Expansion

A second, more structural transmission channel is the surge in defense spending and its impact on government borrowing. The White House submitted an $87.6 billion supplemental funding request to cover costs of the Iran war, with $67.1 billion (77%) going to the Pentagon [17]. The largest single item is $21 billion for munitions replenishment, bringing total munitions funding requested this year to $97.3 billion—more than three times the Army’s entire FY26 procurement budget [17]. The FY27 defense budget request already included a record $1.5 trillion, split into a $1.1 trillion base budget, a $350 billion reconciliation request, and the new supplemental [17]. Israel’s defense spending has similarly ballooned: the 2026 budget allotted a record NIS 143 billion ($45.8 billion), and the Defense Ministry is seeking a total of 188 billion shekels ($62 billion), which could force an immediate 4.5 percentage-point increase in VAT [18][19].

This fiscal expansion is occurring against an already deteriorating U.S. fiscal backdrop. The federal deficit is projected at roughly $1.9 trillion (5.8% of GDP) for fiscal 2026, and the debt-to-GDP ratio has surpassed 100% [20]. The Yale Budget Lab predicts that 10-year Treasury yields will increase by 1.4 percentage points over recent levels by 2054 if the consequences of the One Big Beautiful Bill Act are extrapolated [21]. The bond market is responding to these fiscal concerns: CNBC noted that U.S. Treasurys have failed to provide their usual safe-haven protection partly because “the U.S. federal deficit is projected at roughly $1.9 trillion” and “bond markets are not driven by growth but driven by inflation expectations” [20]. The increased supply of government debt to finance war spending and tax cuts is exerting upward pressure on yields across the curve.

Geopolitical Risk Premia and Bond Market Dynamics

The conflict has introduced a persistent geopolitical risk premium into sovereign bond markets. Unlike classic risk-off episodes where capital flees to the safety of U.S. Treasurys, the 2026 turmoil has been driven by inflation fears, higher real yields, and fiscal concerns. The 10-year Treasury yield rose to 4.49% by the week ending July 4, 2026, while the 2-year yield surged 76 basis points since early February to 4.14%, and the 30-year yield reached 4.98% [6]. The six-month Treasury yield has climbed nearly 50 basis points since January to 4%, now 35 basis points above the effective federal funds rate—a clear signal that the bond market expects multiple rate hikes [6].

This dynamic reflects a fundamental shift: safe-haven assets are no longer moving in lockstep. Gold, traditionally a hedge against geopolitical turmoil, fell over 14% in Q2 2026, on track for its worst quarterly performance in 13 years, as higher real yields and a stronger dollar overwhelmed haven demand [22]. The Japanese yen sank to a 40-year low of 162.77 per dollar, despite a record 11.7 trillion yen ($73.5 billion) in currency interventions, because the widening interest rate gap between the U.S. and Japan makes the yen the funding currency for carry trades [23][24]. As one analyst noted, “Intervention can slow a fall, punish speculative excess and signal official discomfort. But it cannot repeal arithmetic” [24]. The persistent weakness of the yen raises the risk that Japan may be forced to offload some of its $1.09 trillion in U.S. Treasury holdings to stabilize domestic markets, which would put further upward pressure on U.S. yields [25].

Global Central Bank Responses

The inflationary shock has forced central banks worldwide to abandon or reverse easing plans. The European Central Bank raised its key interest rate in June 2026—its first hike since 2023—with President Christine Lagarde defending the move as “justified under every scenario” [26]. Bundesbank President Joachim Nagel warned on June 30 that inflation is likely to remain “significantly above target” despite peace talks, stating: “The energy price shock… is still in the system. I suspect the inflation rate will stay significantly above our target” [27]. The Bank of Japan raised its key rate to 1.0% on June 16, 2026—the highest in 31 years—yet the yen continued to weaken because U.S. rates remain significantly higher [25]. The Bank of England held its Bank Rate at 3.75% in June, but hawkish MPC member Catherine Mann signaled she may push for an “activist” rate hike later in 2026 if inflation expectations do not cool [28]. This synchronized hawkish tilt among major central banks reinforces the global “higher-for-longer” rate environment.

Federal Reserve Policy Implications

The Fed’s Dilemma: Inflation vs. Growth

The Federal Reserve entered 2026 having cut rates by 75 basis points in the final months of 2025, bringing the federal funds rate to 3.50%–3.75% [10]. The Iran war upended that trajectory. Headline inflation more than doubled the Fed’s 2% target, reaching 4.2% in May, while core PCE climbed to 3.4% [10]. At the same time, the economy has shown mixed signals: consumer spending rose 0.7% in May, and the Atlanta Fed projected Q2 GDP growth of 2.5%, but nonfarm payrolls increased by only 57,000 in June—well below the 115,000 consensus forecast—and the unemployment rate improved to 4.2% [10][29][30]. Consumer confidence fell to 91.2 in June, still below year-ago levels, and the share of Americans saying jobs are “hard to get” rose to 22.5% [31].

This places the Fed in a classic policy dilemma. On one side, inflation is running at more than double the target, and 81% of credit market participants now expect inflation of 3% or higher in the second half of 2026, up from 52% last quarter [32]. On the other side, the June jobs report showed a sharp slowdown in hiring, and some economists attribute the weakness to “a delayed response to the Middle East conflict, which has raised gasoline prices and boosted inflation” [30]. LPL Financial Chief Economist Jeffrey Roach warned: “If the Iran crisis creeps into the Labor Day timeframe, we have a much higher chance that inflation pressures will seep into other categories and will force the Fed’s hand” [10].

Chair Warsh’s New Course and Independence

The policy calculus is further complicated by the change in Fed leadership. Kevin Warsh replaced Jerome Powell as Fed Chair on May 22, 2026, and has quickly established a hawkish, independent stance [3][33]. Speaking at the ECB Forum in Sintra, Portugal on July 1, 2026, Warsh delivered a blunt message: “We’ve all looked around, and we’ve seen that prices are too high… We’re going to deliver price stability in the U.S.” [33]. He explicitly rejected any suggestion that the Fed would tolerate above-target inflation: “If there were people in household or the business sector, in the financial markets, who thought that this central bank was going to be comfortable with an inflation objective above 2%, well, I guess they’d be disappointed” [33].

Warsh has also broken with decades of Fed practice by refusing to provide forward guidance, arguing that previewing actions can make policymakers “prisoners of their own words” [34]. He has removed forward-looking language from FOMC statements and set up five internal task forces to review Fed operations, including one focused on real-time economic data using new technologies [35]. This opacity has introduced additional uncertainty into rate expectations, with market participants warning that his silence risks creating a “free-for-all” as investors rely on disparate voices [34].

Crucially, the Fed’s independence has been affirmed by the Supreme Court. On June 29, 2026, the Court ruled 5–4 that President Trump was wrong to oust Fed Governor Lisa Cook without due process, with Chief Justice John Roberts writing that “not only the fact of independence but also the appearance of independence is key to the Federal Reserve’s design” [36]. This ruling, combined with Warsh’s assertive posture, has largely neutralized political pressure for rate cuts, forcing President Trump to shift his focus to pressuring gasoline retailers instead [36].

Market Pricing and the Path of Rates

At the June 16–17, 2026 FOMC meeting, the Committee held rates steady at 3.50%–3.75% in a unanimous 12–0 vote, but the dot plot revealed a sharp hawkish shift: nine of 18 members projected at least one rate hike in 2026, with six of those nine expecting multiple hikes [5][37]. The median year-end 2026 inflation forecast jumped from 2.4% in December 2025 to 3.6% in June 2026 [38]. No policymaker in December had expected rate increases in 2026; by June, roughly a third of officials did [38].

Markets have priced accordingly. As of early July 2026, interest rate futures showed an 80% probability of at least a quarter-point rate hike by year-end [10]. The probability of a September hike stood at roughly 60–67%, though it dipped to about 54% after the weak June jobs report [29][39]. The six-month Treasury yield at 4%—35 basis points above the effective federal funds rate—indicates the bond market expects more than one rate hike within six months [6]. As Wolf Street summarized, “The bond market is clearly telling the Fed that the incoming data calls for multiple rate hikes, whether the Fed wants them or not” [6].

Analyst expectations vary. United Overseas Bank predicts “an extended period of policy pause through 2026 before the Fed resumes easing in 2027” [40]. UBS Global Wealth Management believes the Fed will not hike this year and sees possible cuts as early as Q1 2027 [40]. Franklin Templeton’s Chris Galipeau expects the Fed to hold steady, looking through Iran war risks [40]. The divergence reflects genuine uncertainty about whether the inflation impulse will prove transitory or become embedded.

Trade-offs and Risks

The Fed’s path is fraught with risk. Hiking into a slowing labor market could tip the economy into recession, particularly if the Iran situation escalates again—the 60-day MOU window expires in mid-August 2026, and President Trump has already discussed resuming full-scale war with his defense secretary [41][42]. Conversely, failing to act decisively could allow inflation expectations to become unanchored, forcing even more aggressive tightening later. Bundesbank’s Nagel captured the uncertainty: “Now we have to wait, the situation is still very opaque. Is it stable or not in the Middle East? We do not know. There are peace talks, there are 50 days more or less left, then we will see how reliable this whole situation is” [27].

Warsh has also highlighted the wildcard of artificial intelligence. He noted that AI could eventually expand productive capacity and reduce inflationary pressures, but acknowledged that the current boom in AI capital expenditures is boosting demand and may be fueling inflation in the near term [33]. This dual-edged dynamic adds another layer of complexity to the policy outlook.

Sector Winners and Losers Under Higher-for-Longer Rates

Equity Sector Performance

The higher-for-longer rate environment, driven by war-induced inflation, has produced a stark divergence in U.S. equity sector performance. The S&P 500 gained 9.55% in the first half of 2026, and the Nasdaq Composite rose 12.79%, but these headline figures mask significant sectoral rotation [43].

Winners:

The Energy sector has been the most direct beneficiary. Elevated oil prices, driven by the Strait of Hormuz disruption, boosted energy earnings, and the sector is expected to lead S&P 500 earnings growth in Q2 2026 [44]. However, this tailwind may fade if oil prices continue to decline from their mid-May peak, as Brent has already fallen 39% from its March highs [45].

The Technology and AI/Semiconductor sector has been the standout performer, driven by structural demand for AI infrastructure that has proven largely resilient to interest rate concerns. The Philadelphia Semiconductor Index posted its best quarter on record in Q2 2026, and the iShares Semiconductor ETF soared 113% in the first half [46][47]. Seven S&P 500 AI stocks more than tripled in 2026, led by Sandisk (+857.8%), Micron Technology (+304.4%), and Intel (+278.4%) [48]. However, there are signs of froth: Microsoft was down 18% in June 2026, its worst month since 2000, and some strategists warn of a 10–20% correction in AI names as investors question whether hyperscalers’ massive spending will ever pay off [49][50].

The Defense industry has seen significant growth, fueled by the surge in military spending. Palantir Technologies, which announced a formal partnership with Nvidia to provide sovereign AI capabilities to U.S. federal agencies, reported Q1 2026 revenue growth of 85% year-over-year, with U.S. government revenue up 84% [51]. The broader defense sector benefits from the $97.3 billion in munitions funding requested this year and the structural theme of increased defense spending [17].

Healthcare has emerged as a defensive winner. The S&P healthcare sector hit a new high in late June 2026, up about 8% in a month, and Healthcare Equipment & Services was named the most favorable sector for credit investment in H2 2026 by 38% of survey respondents [32][49]. Industrials and Capital Goods have also benefited, with Schwab Asset Management recommending areas like industrials that are “at the beginning of taking advantage of the AI structure” [52]. Utilities gained from a heatwave across the U.S., with the sector up roughly 3% in a week [49].

Losers:

Real Estate, particularly residential, has been pressured by elevated mortgage rates. Although the average 30-year fixed rate fell to 6.43% in early July—its lowest in seven weeks—listing prices were down 2.5% year-over-year in June, the steepest annual decline since 2017 [53]. Industrial real estate, by contrast, has become the largest allocation in JLL Income Property Trust’s portfolio, offering cash-on-cash returns of 5.5%–6.5% versus 4.5% for apartments [54].

Consumer Discretionary has suffered from the squeeze on household budgets. Nike shares are off 48% from their August 2025 high, and Constellation Brands is down 21% from July 2025 highs [49]. The leisure and hospitality sector lost 61,000 jobs in June, the largest drop since December 2020, attributed to weaker seasonal hiring and possible consumer pullback due to elevated gasoline prices [30].

Software was named the least favorable sector for credit investment by 71% of survey respondents, driven by ongoing AI disruption concerns [32]. Healthcare is the only S&P 500 sector expected to report a year-over-year earnings decline in Q2 2026, though this is largely due to tough comparisons rather than structural weakness [44].

Asset Class Performance

The higher-for-longer rate environment has reshaped relative asset class returns.

Equities have been the standout performer, with the S&P 500’s Q2 2026 gain of 15% marking its strongest quarter in six years [52]. S&P 500 blended earnings growth for Q2 is projected at 23.3% year-over-year, and calendar year 2026 earnings growth is expected at 24.1% [44][55]. JPMorgan raised its year-end S&P 500 target to 7,800, and industry analysts project a 21% gain over the next 12 months [52][55]. The Russell 2000 small-cap index surged nearly 22% in H1 2026, its best first half since 1991, reflecting a rotation toward domestically oriented cyclicals [56].

Fixed Income has been under pressure. The 10-year Treasury yield has risen to 4.49%, the 2-year to 4.14%, and the 30-year to 4.98% [6]. Short-term yields have risen even more sharply, with the six-month T-bill at 4% and the one-year yield near or above 4% [6]. This has created attractive entry points for income-oriented investors: top CD rates reached 4.94% APY for six-month instruments, and many of the best CD rates continue to outpace inflation [57]. However, bond prices have suffered, and traditional safe-haven properties have been disrupted—Treasurys have not provided their usual protection during 2026 volatility because the selloff has been driven by inflation fears and fiscal concerns rather than growth fears [20].

Gold has been a notable loser in the near term, falling over 14% in Q2 2026 and 7.5% year-to-date, with spot prices dipping below $4,000 per ounce for the first time since early November [22]. The decline has been driven by higher real yields and a stronger dollar, which have overwhelmed haven demand. However, the structural case for gold remains intact: central banks added a net 41 tons in May 2026, the second-highest monthly total of the year, and 89% of central bankers expect global gold reserves to increase in the next 12 months [58][59]. Goldman Sachs maintains a $4,900 per ounce target by end-2026, and JPMorgan expects gold to average $4,300/oz in Q3 and $4,500/oz in Q4 [60][61].

Commodities broadly have benefited from the conflict. Goldman Sachs advises diversifying into commodities, favoring copper and gold, and raised its end-2026 copper forecast to $13,735 per metric ton, citing structural themes of energy security, AI, electrification, and defense spending [60]. Silver, despite a 21% drop in June, may have significant recovery potential given industrial demand from solar, electronics, and AI data centers against multi-year supply deficits [62].

Cash and cash equivalents have become more attractive. With the six-month T-bill yield at 4% and top CD rates near 5%, cash is finally offering positive real returns after years of negative real yields [6][57]. This has implications for portfolio allocation, as the opportunity cost of holding cash has declined.

Investment Strategies

The higher-for-longer rate environment, driven by war-induced inflation, calls for a nuanced investment approach. Several strategies have emerged from the research:

1. Maintain equity exposure with a rotation toward cyclicals and value. Wall Street strategists broadly expect the bull market to continue, driven by earnings and liquidity. Ross Mayfield of Baird stated: “It’s a bull market driven by earnings and liquidity, and those are the kind of things that can keep this going into the 2nd half of the year, and probably, in my opinion, into 2027 as well” [52]. However, the leadership is rotating away from high-flying technology toward industrials, healthcare, materials, and small/mid-cap stocks that are earlier in their AI adoption cycle [52].

2. Diversify into commodities and real assets. Goldman Sachs recommends sticking with winners in North Asia—overweighting South Korea, Taiwan, Japan, and China’s A-share market—while diversifying into commodities, particularly copper and gold [60]. The same structural themes of energy security, AI, electrification, and higher defense spending bolster demand for industrial metals [60]. Sovereign wealth funds managing $29 trillion in assets are pivoting toward energy security and transition infrastructure, with 80% viewing energy investments as most credible for portfolio resilience [63].

3. Lock in attractive fixed income yields. With the six-month T-bill at 4% and top CD rates near 5%, investors can earn positive real returns on cash for the first time in years [6][57]. Banks are raising brokered CD yields above 4% to compete with T-bills, and locking in these rates before potential rate cuts in 2027 may be prudent [6].

4. Maintain strategic gold exposure despite near-term weakness. Central bank buying remains robust, and the structural case for gold as a portfolio diversifier and hedge against fiscal and geopolitical risks is intact. HSBC analysts argue that gold’s decline during the Iran conflict was due to liquidation for cash needs, not a failure as a safe haven, and they anticipate further upside by year-end [64].

5. Be selective in credit markets. The leveraged finance market is expected to remain bifurcated: stronger issuers will still find capital, while weaker borrowers with limited free cash flow, high leverage, or near-term maturities may need restructuring alternatives [32]. Software is viewed as the least favorable sector for credit investment due to AI disruption risks [32].

6. Consider international diversification, particularly in Asia and Europe. The MSCI Emerging Markets Technology index surged over 90% in H1 2026, and South Korea’s Kospi gained 101.1% [43]. European equities have benefited from lower oil prices and a weaker euro, though most investors remain unconvinced of a durable rotation away from U.S. markets [65].

7. Monitor the August MOU deadline. The 60-day negotiating window expires in mid-August 2026, and President Trump has already discussed resuming full-scale war [41][42]. A re-escalation would likely send oil prices spiking again, push inflation higher, and force the Fed’s hand on rate hikes. Conversely, a successful diplomatic resolution could ease inflation pressures and allow the Fed to remain on hold. The geopolitical tail risk remains the single most important variable for asset allocation in the second half of 2026.

Conclusion

Trump’s military actions in the Middle East have set in motion a powerful transmission mechanism from war-driven inflation to higher global interest rates that will persist for years. The Strait of Hormuz closure created the largest energy supply disruption on record, pushing headline inflation to more than double the Fed’s target and forcing central banks worldwide to abandon easing plans. The surge in defense spending—$97.3 billion in munitions funding alone—is adding to already bloated fiscal deficits, increasing bond supply and exerting upward pressure on yields. Geopolitical risk premia have disrupted traditional safe-haven relationships, with Treasurys, gold, and the yen all responding to their own macro fundamentals rather than moving in lockstep.

The Federal Reserve, under new Chair Kevin Warsh, has signaled unwavering commitment to price stability, and markets are pricing a high probability of rate hikes beginning in September. The policy path is fraught with risk: hiking into a slowing labor market could tip the economy into recession, while failing to act could allow inflation expectations to become unanchored. The outcome hinges critically on whether the fragile U.S.-Iran ceasefire holds beyond the August MOU deadline.

For investors, the higher-for-longer rate environment demands a disciplined, diversified approach. Energy, defense, AI/semiconductors, and healthcare have been the clear equity winners, while real estate, consumer discretionary, and software have lagged. Fixed income yields have become attractive for the first time in years, and strategic allocations to gold and commodities offer hedges against fiscal and geopolitical risks. Above all, the situation demands vigilance: the Middle East remains a tinderbox, and the economic consequences of any re-escalation would be swift and severe.