Perils of the Bull Market in U.S. Stocks

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May 7, 2025

The U.S. stock market is currently facing a precarious phase, threatened by uncertainties surrounding the government's tariffs and the potential economic impacts of artificial intelligenceThe S&P 500 index, a key benchmark that has seen remarkable gains of up to 70% since October 2022, is now caught in a tight range around 6000 points following a significant downturn caused by the “DeepSeek Shockwave” on January 27thThis sudden volatility has not only unsettled investors but has also rekindled fears of the "inflation ghost," which had previously caused immense turmoil in the financial marketsShould the latest inflation data surpass expectations, a sharp sell-off in U.S. stocks could ensue.

According to recent forecasts from J.PMorgan’s market intelligence trading department, there’s significant speculation regarding the impact of January’s Consumer Price Index (CPI) on the S&P 500. If the CPI rises by 0.4% or more month-over-month, the S&P 500 could potentially fall by 2%. Conversely, if the increase is 0.2% or less, the index might witness a 1% uptickThese predictions underscore the delicate balance the market is attempting to maintain amid evolving economic indicators.

Andrew Taylor’s J.PMorgan team commented in their report, “Expect significant fluctuations in the bond market, leading to soaring U.STreasury yields that will ultimately suppress stock valuationsThis shift suggests that the Federal Reserve’s federal funds rate may no longer be viewed as restrictive, with the likelihood favoring rate hikes rather than cuts in the future.” Such an increase in bond yields is likely to bolster the dollar, further applying pressure on equity marketsThe release of CPI data at 8:30 AM New York time on a given day, critical for global markets, will be pivotalTaylor’s team noted that the market appears to have overreacted to recent consumer confidence and inflation expectations data from the University of Michigan, setting the stage for heightened scrutiny of the upcoming CPI report.

The prospects for the S&P 500 on the day of CPI data release are concerning—significantly high inflation figures could adversely affect the index

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Despite some strategists on Wall Street maintaining a tactically bullish stance on the U.S. stock market, expecting growth to exceed trend levels, they acknowledge that higher-than-anticipated inflation figures could challenge this optimistic outlookConsensus among economists suggests an anticipated month-over-month rise of 0.3% in the CPI for January, while options markets indicate an implied volatility slightly below 1% for the S&P 500. Historical trends point to substantial market movements following the release of CPI figures: even mild positive deviations from predictions have been known to incite significant rallies.

In light of over two years of robust gains in the S&P 500, investors are now grappling with the possibility that U.S. tariffs could exacerbate inflation locally, compounded by persistently high benchmark interest ratesInvestors are expressing skepticism regarding the inflated valuations of large-cap tech stocks, which constitute a considerable weight in the S&P 500, especially in the context of the ongoing transformation driven by DeepSeek, a low-cost AI computing modelMajor financial players like Barclays have suggested that investors consider diversifying their portfolios away from U.S. equities, advocating for shorting American stocks while investing in European markets instead.

Barclays' sentiments align with views expressed by Morgan Stanley’s wealth management division, highlighting significant cracks in the bullish narrative surrounding U.S. equitiesTheir analysis supports that the Fed’s pause on interest rate cuts and the ongoing impact of DeepSeek’s low-cost AI innovations are fundamentally reshaping the dynamics of the equity bull marketFederal Reserve Chair Jerome Powell recently emphasized to the Senate that the central bank need not rush to adjust interest rates, acknowledging that while inflation appears to be moderating, it still exceeds the targets set by the FedHis statements have undoubtedly contributed to an uptick in bond yields, reinforcing a more hawkish outlook.

Since last summer, responses to macroeconomic data from U.S. equity markets have exhibited significant volatility—data reflecting intraday price movements of the S&P 500 on reporting days have shown considerable reactions, revealing the market's sensitivity to evolving economic signals.

Dominic Wilson, a renowned strategist from Goldman Sachs, indicated that his team’s inflations forecasts slightly exceed the broader market consensus

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He cautioned that these figures could provoke severe fluctuations in both stock and bond markets, potentially leading to substantial corrections in U.S. equitiesIndeed, after the CPI data for the previous month was made public, the S&P 500 experienced a positively skewed movement of up to 2% in January, while following the December Fed interest rate decision, the index faced negative shifts as high as 3%.

Wilson’s team thorough investigation reveals, “If the incoming data aligns closely with market expectations, bearish sentiment may ease slightly.” They postulate that underlying inflation pressures, exclusive of tariff impacts, could be more subdued than the prevailing market anticipations; however, tariffs may offset such influences in the immediate term, causing the team to recently revise upward their inflation projections, which have already been partially accounted for in financial market adjustments.

Nick Timiraos, often referred to as the “new Fed whisperer,” elaborates on typical corporate practices in January, where companies commonly assess rising costs of food, energy, and labor over the previous yearThis influences potential price adjustments for essential goods and services—restaurants, for instance, might increase menu prices, gyms may raise membership fees, private equity advisors may enhance performance bonuses, while ride-sharing services could hike their rates.

In light of Powell’s latest remarks to the Senate, Timiraos observed, “He encapsulated the Fed’s roadmap for 2025: if inflation doesn't decline, the rates will stay unchanged; if economic slowdowns deepen, rate cuts may be considered.” This perspective aligns with the broader narrative in financial markets, suggesting that the trajectory of interest rates, inflation, and sector-specific valuations will remain keenly monitored by investors in the coming monthsThe anticipation of future policy moves will be pivotal in shaping not only investor sentiment but also the overall recovery pattern of the financial landscape.

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