Stock market today: Dow, S&P 500, Nasdaq slide as government shutdown looms, inflation data improves but still sticky

The potential for a government shutdown could lead to increased volatility in the stock markets, particularly affecting sectors reliant on government spending. Inflation data indicating decelerating price gains could influence Federal Reserve policy and interest rates, thereby affecting tech stocks. Additionally, Novo Nordisk's failure in drug trials represents a significant blow to investors and may lower confidence in pharmaceutical investments.

The negative sentiment around tech stocks due to external pressures like government uncertainty may lead to further declines, particularly in high-growth stocks and sectors. The performance of large caps in these sectors could stabilize if broader market reassurances come from the Fed's stance on interest rates.