U.S. markets face a potentially volatile week as a looming August 1 deadline for increased tariffs, imposed by President Trump on several trade partners, could disrupt the recent calm that propelled the S&P 500 and Nasdaq to record highs. The market has surged in recent months, with the S&P 500 up 28% and the Nasdaq up 38% since early April. However, this rally has pushed valuations to historically high levels, leaving equities vulnerable to negative surprises.

In addition to trade tensions, investors are bracing for a busy calendar that includes the Federal Reserve’s rate decision, a key U.S. employment report, and major tech earnings from Apple, Microsoft, Amazon, and Meta. The Fed is expected to hold rates steady while assessing the inflationary impact of tariffs, despite political pressure from the White House to cut. Volatility has eased, but recent meme stock activity suggests pockets of speculation remain.

With second-quarter earnings beating expectations so far, markets are priced for strong economic momentum, but any misstep, from tariffs to tech results, could quickly reverse sentiment.