Stock market today: Dow, S&P 500 slip as Trump stays firm on August tariff deadline, announces copper duties

U.S. equities, with the Dow and S&P 500 slipping, reacted to renewed trade tensions on Tuesday after President Trump reaffirmed an August 1 tariff deadline and announced a 50% duty on copper imports, alongside threats of up to 200% on pharmaceutical imports. This policy stance immediately impacted markets, driving copper futures up over 10% and causing major pharmaceutical stocks like Pfizer and Amgen to pare earlier gains, underscoring investor sensitivity to escalating trade policy.

Analysis

U.S. equity markets experienced a risk-off sentiment, with the Dow Jones Industrial Average declining by approximately 0.4% and the S&P 500 also slipping, driven by renewed trade policy uncertainty. President Trump's reaffirmation of an August 1 deadline for broad tariffs, eliminating the possibility of further extensions, has re-introduced a significant headwind for markets. The announcement of specific new duties triggered sharp, targeted reactions: a proposed 50% tariff on copper imports caused futures (HG=F) to surge over 10%, while the threat of tariffs as high as 200% on pharmaceuticals immediately pressured the sector, causing stocks such as Pfizer (PFE), Amgen (AMGN), and AbbVie (ABBV) to pare their gains. Separately, Amazon (AMZN) shares fell over 1% amid its Prime Day event, with investors watching for signs that existing tariff costs are impacting consumer prices. The market now awaits further catalysts, including the Federal Reserve's June meeting minutes and the start of earnings season signaled by Delta's (DAL) upcoming report.

Key Decisions for Investors

• Investors in the pharmaceutical sector, particularly in names like PFE, AMGN, and ABBV, should brace for heightened volatility and monitor for specific details on the threatened 200% tariffs, which represent a material risk to earnings.
• The 50% tariff on copper imports directly impacts input costs for industrial companies; traders should assess the durability of the 10% spike in copper futures and its inflationary implications for downstream users.
• Given the firm August 1 tariff deadline, it is prudent to review portfolio exposure to sectors with high international supply chain dependency, as they are most vulnerable to the escalating trade conflict.
• Watch Amazon's Prime Day performance and subsequent management commentary closely for evidence of tariff pass-through to consumers, which would be a key indicator for the broader retail sector's pricing power and margin stability.