Markets & Economy S&P 500 Is Up 12% in 2026 But a 1907 Crash Signal Is Back August 30, 2026 · 9:04 pm 1 sources Image: Yahoo Finance ad slot · in-content video 16:9 Coverage More coverageS&P 500 Is Up 12% in 2026 But a 1907 Crash Signal Is BackYahoo Finance · August 30, 2026 21:04