S&P 500 jumped from 11% to over 13% YTD in four sessions; inflation data looms as test

The S&P 500's year-to-date gain leapt from 11% (August 3 close, per AP News) to above 13% by August 7, per Reuters — roughly two percentage points in four trading days. Reuters flagged the acceleration as a test of whether fundamentals or positioning drove the move. Upcoming inflation data could shift Federal Reserve rate expectations and challenge the rally's durability.