Indices slide as tech sells off and key supports tested

U.S. stocks are in a broad, tech-led sell-off, with the Dow, S&P 500, and Nasdaq extending multi-day losses while Bitcoin also plunges. Technical coverage highlights SPY threatening to fall below its 100-day moving average for the first time in nine months, even as interest rates and equity index futures begin to stabilize after sharp intraday swings. Heavy trading in the most active U.S. names and fragile sentiment point to elevated volatility that retail traders and investors are preparing to navigate.