Stock market today: Dow, S&P 500, Nasdaq mixed as Trump tariffs kick in, Apple jumps

US equities exhibited mixed performance Thursday as President Trump's new tariffs, imposing 10-50% duties and projecting an 18.3% average effective rate, took effect, with the Dow down 0.5% while the Nasdaq gained 0.6%. Corporate developments were diverse: Apple surged on news of a $100 billion US investment and potential tariff exemptions, contrasting with Toyota's warning of a $9.5 billion tariff impact and Eli Lilly's 14% drop following disappointing drug trial results despite an earnings beat. DoorDash provided an upbeat forecast, while Airbnb and Lyft offered weak guidance, and continuing unemployment claims reached a November 2021 high, adding to economic uncertainty.

Analysis

US equity markets are exhibiting significant divergence, driven by a complex interplay of macroeconomic policy, corporate performance, and weakening economic data. The implementation of broad tariffs, with duties ranging from 10% to 50% and a projected average effective rate of 18.3%, is creating clear winners and losers. This is evidenced by the Dow Jones Industrial Average's 0.5% decline, contrasted with the Nasdaq's 0.6% gain. Tech sector outperformance is largely attributable to company-specific developments, exemplified by Apple (AAPL), which climbed following a $100 billion US investment announcement and indications of exemptions from semiconductor tariffs. Conversely, the negative impact of trade policy is explicit in Toyota's (TM) warning of a $9.5 billion hit from US tariffs. The earnings season is further contributing to this divergence. Eli Lilly (LLY) plunged 14% on disappointing clinical trial results for its oral GLP-1 pill, a development that overshadowed its second-quarter earnings beat. In the consumer technology space, DoorDash (DASH) shares rose on an upbeat forecast, while Airbnb (ABNB) and Lyft (LYFT) fell on disappointing guidance. Adding to market uncertainty, continuing unemployment claims rose to their highest level since November 2021, and reports that Federal Reserve Governor Christopher Waller is a top candidate for Fed Chair appeared to temper early market enthusiasm.

Key Decisions for Investors

• Given the market's clear divergence between tariff-exposed industrial names and certain resilient technology companies, investors should re-evaluate portfolio exposure to international supply chains and favor firms with strong domestic growth drivers or potential policy exemptions.
• The sharp, disparate stock reactions to earnings and guidance from DoorDash, Airbnb, and Lyft underscore the importance of bottom-up, company-specific analysis over broad sector bets in the current environment.
• The 14% decline in Eli Lilly's stock despite an earnings beat highlights the critical risk of clinical trial outcomes in the biopharmaceutical sector, warranting caution and thorough due diligence on pipeline catalysts.
• Monitor leading economic indicators, particularly labor market data and communications regarding Federal Reserve leadership, as these factors are creating significant volatility and could swiftly alter market sentiment and monetary policy expectations.