Progressive Corp. (PGR)

PGR's stock fell 13.12% after the company released second quarter results that missed analysts’ estimates. PGR's combined ratio - a measure of underwriting profitability - came in worse than expected. Mayfield Village, Ohio-based Progressive was the worst performer among S&P 500 stocks on the day.

https://finance.yahoo.com/news/progressive-heads-worst-day-since-193312745.html