Global equities are displaying weakness at the onset of September as rising oil prices push bond yields higher across the board, reinforcing market bets on further interest rate hikes by major central banks this month. The bond selloff is intensifying, with traders growing increasingly concerned about oil-driven inflation, tightening monetary policy, and deteriorating fiscal conditions. As of the latest update, Dow futures are down 0.48%, S&P 500 futures have slipped 0.43%, and Nasdaq futures are off 0.93%. Stocks tied to global artificial intelligence infrastructure development are broadly weaker, contributing to the cautious tone.

The month has opened with heightened risk aversion, which bodes poorly for September—historically one of the weakest months for the S&P 500. Data compiled by Bloomberg shows that over the past three decades, the index has averaged a 0.8% decline in September. The softness extended to European markets on Tuesday, where mining, travel, and leisure stocks dragged the Stoxx 600 toward its worst single-day performance since July. Meanwhile, ongoing disruptions to energy transportation through the Strait of Hormuz have pushed Brent crude prices above $92 per barrel. According to maritime security consultancy Marisks, two large tankers were struck by unidentified projectiles in succession while transiting the strait, marking the latest escalation in Middle East tensions.

Bond markets are experiencing a猛烈 selloff as the Middle East crisis intensifies global price pressures, sending yields soaring from Tokyo and Sydney to New York and London. Investors now anticipate that central banks may need to raise rates further, while the bond market faces significant pressure from a wave of new issuance. Major technology firms are aggressively raising capital to fund AI-related investments, U.S. debt has surpassed $40 trillion, and Japanese government ministries could submit record budget requests for the next fiscal year. When bond prices fall, yields rise, and the rapid increase in yields is presenting policymakers with fresh challenges, given the market's heightened sensitivity to any signs of uncontrolled fiscal spending. In Japan, this translates into higher costs for servicing government debt, with the nation carrying the largest debt burden among developed economies while Prime Minister Takayuki Sanae pushes forward with ambitious investment plans.

Masahiko Loo, senior fixed income strategist at State Street Global Advisors in Tokyo, noted that "as sovereign issuance and corporate funding needs compete for the same pool of capital, investors are increasingly demanding higher compensation to take on duration risk." He added that "bond investors are now less concerned about growth risks and are increasingly focused on inflation and bond supply."

Bond yields are holding at multi-year highs globally. Japan's 10-year government bond yield has climbed to 3%, the first time since September 1996, while the 5-year yield hit a record high of 2.26% and the 2-year yield rose to 1.795%, the highest in 31 years. U.S. Treasury yields are moving higher across the curve, with the 10-year note reaching its highest level since January 2025 and the 30-year yield maintaining levels above 5% for the longest stretch since 2006. Australia's 10-year yield recorded its biggest one-day jump in five months, partly reflecting trader sensitivity to shifting Japanese capital flows amid speculation that domestic investors may reduce allocations to Australian bonds as local yields rise. In Europe, UK gilts are noticeably underperforming, with the 30-year yield climbing to its highest since 1998, while German 10-year yields rose to 3.34%, the highest since 2011 and a key benchmark for the eurozone.

Investors are demanding higher risk premiums for holding bonds as concerns mount over government spending, persistent inflation, and aggressive corporate borrowing for AI infrastructure. U.S. rate expectations have turned more hawkish, with traders currently pricing in approximately a 70% probability of a Federal Reserve rate hike in September. Joachim Klement, strategist at Panmure Liberum, said equity investors "should be more worried about rising long-term bond yields, especially in the U.S." He pointed to "persistent inflationary pressures and the more hawkish stance from Kevin Warsh at Jackson Hole last week, both of which point to yields continuing higher."

The U.S. dollar is strengthening against most major currencies, while the yen weakens again as markets increase bets on a Bank of Japan rate hike this month. Japanese policymakers have adopted a more hawkish tone in recent weeks, and U.S. Treasury Secretary Scott Bessent has also urged the BOJ to tighten policy. Expectations for near-term Fed tightening have risen following Federal Reserve Chair Kevin Warsh's clearly hawkish remarks at the annual Jackson Hole symposium. Andrew Lilley, chief rates strategist at Barrenjoey in Sydney, observed that "the global yield selloff partly reflects synchronized declines in several of the most important and closely watched markets," including the U.S. and Japan. He added, "I think this selloff is largely a result of the market reassessing Fed policy." There is also growing concern that central banks may already be behind the curve in tightening. "The last thing policymakers want is to have the market do half the tightening for them out of fear that risks are too great if they don't act," Lilley said. Meanwhile, eurozone inflation has accelerated to near three-year highs, strengthening the case for a European Central Bank rate hike next week.

Gold prices are sliding toward two-week lows, with spot gold down 1.76% to $4,370 per ounce, hitting its lowest level since August 19 at $4,365. Ole Hansen, analyst at Saxo Bank, commented that "since Kevin Warsh's hawkish speech last Friday, global bond yields have been rising, which is putting further downward pressure on gold prices." Over the next two days, global finance ministers will convene at the G20 summit in Asheville, North Carolina, with investors watching for market-moving comments and further discussion on stubborn inflation and rising funding costs. In the U.S., Palo Alto Networks and Dell are set to report earnings.

Treasury buybacks to support the market are proving insufficient amid a $215 billion corporate bond issuance wave in September. Despite Treasury Secretary Bessent's surprise announcement last month of expanded buybacks of older bonds to curb yield increases, many investors are not counting on a sustained reversal. Following record issuance in August, September is expected to see $215 billion in corporate bond offerings, which would offset the impact of Treasury purchases. Meanwhile, few expect concerns about U.S. fiscal deficits—which have been suppressing government bonds—to fade in the near term. The Fed's September meeting will test Chair Kevin Warsh's resolve to hike rates in the face of stubborn inflation; any hesitation could accelerate the selloff in long-dated Treasuries. Since longer-dated bonds are more vulnerable to inflation concerns, signs that the Fed will hold rates steady even as consumer prices accelerate would give investors more reason to steer clear of the struggling 30-year bond.

Citadel Securities highlights that September's seasonal weakness, combined with cheap options, has sharply deteriorated the short-term risk-reward for U.S. stocks. September is historically the worst month for U.S. equities, with the S&P 500's average monthly return hitting its lowest level of the year. Now, with options prices at their cheapest levels of the year, the risk-reward for buying downside protection looks attractive. Scott Rubner, head of equities and equity derivatives strategy at Citadel Securities, made this case in a report, noting that the bullish backdrop that drove the S&P 500 to record highs in August is shifting. He cited the earnings calendar, stock buyback prospects, seasonality, and retail trading patterns as reasons for caution. "Taken together, they change the short-term asymmetry. Upside catalysts are becoming less obvious, while downside catalysts are increasing," he said.

Following Warsh's hawkish stance, JPMorgan Chase has temporarily abandoned its bullish view on U.S. stocks. After Fed Chair Warsh's hawkish speech last week, markets have significantly raised bets on further rate hikes this year, making uncertainty over the rate outlook a key near-term pressure on U.S. equities. JPMorgan Chase's trading desk has thus temporarily set aside its previous bullish stance, turning cautious on market movements in the coming weeks. However, the bank emphasized that this does not mean it has turned bearish on U.S. stocks. JPMorgan Chase believes U.S. economic data and corporate earnings remain supportive and the stock market's fundamentals are still strong, but several near-term uncertainties could push equities into a consolidation phase ahead of the Fed's next rate decision on September 16.

In individual stock news, rising U.S. bond yields are weighing on the broader market, with chip stocks starting the new trading month weak. The VanEck Semiconductor ETF (SMH) is down over 1%, with Nvidia (NVDA), AMD, and Micron Technology (MU) each falling more than 1%. Energy stocks are broadly higher as oil prices rise amid ongoing Middle East tensions, with the Energy Select Sector SPDR Fund (XLE) gaining over 1%. EOG Resources (EOG), Diamondback Energy (FANG), and Targa Resources (TRGP) are each up more than 1%. Morgan Stanley upgraded Robinhood from equal-weight to overweight, sending the online brokerage's shares up over 2%. The firm's analysts said, "Robinhood's platform continues to expand, converting product iteration speed into better customer economics." Novartis rose 4% after positive clinical trial data for its multiple sclerosis drug, with the company stating that remibrutinib "significantly" reduces relapse rates compared to other therapies. Evercore ISI upgraded Duolingo from in-line to outperform, lifting the language-learning app's shares by 6%, citing favorable survey data. Medical device maker Medtronic gained 5% after raising its fiscal 2027 guidance, now expecting earnings per share in the range of $5.94 to $6.00, versus a prior range of $5.90 to $6.00.