Yahoo Finance Live: Daily Market Coverage — Sep 18, 2026, 9–11AM ET

Bullish Gator

Morning brief, Opening Bid, Market Catalysts; live market coverage and updates on S&P 500, Nasdaq, Fed, inflation.

Editorial companion

What stands out

On September 18, 2026 Yahoo Finance Live spent the morning parsing Fed talk, inflation headlines, and moves in the S&P 500 and Nasdaq, a tidy list of things that actually move trading floors. That attention matters for Nasdaq, Inc. because exchanges are the plumbing of markets; changes in rates and volatility ripple into trading volumes, listings demand, and data licensing. With the 30-year Treasury yield at a 19-year high, institutions are repositioning, and that can quickly alter the order flow that drives Nasdaq's short-term revenue mix.