The Dow Jones Industrial Average fell about 600 points on Thursday as a broad selloff in megacap technology stocks, led by Alphabet and Tesla, rippled through Wall Street and extended pressure on the wider market.
Megacap Tech Selloff Pressures Broader Market

The drop matters because it shows investors are still willing to cut exposure to richly valued growth names when the risk backdrop turns less forgiving. Technology weakness has become the main pressure point for U.S. equities, and the latest slide dragged the Dow lower even as traders continued to rotate toward safer corners of the market.
Tesla was especially volatile, closing at $325.32 after a sharp 13% drop on the day, with trading volume surging to 67 million shares. The stock’s relative strength index fell to 29.9, a level that typically signals an oversold reading, while the price slipped well below both its 50-day moving average of $405.08 and 200-day moving average of $415.44, underscoring how quickly momentum has reversed.
Alphabet also came under heavy pressure, with shares sliding to $320.60 from a recent close of $342.09. Its RSI fell to 30.5, near oversold territory, and the stock finished below both its 50-day average of $366.03 and 200-day average of $323.26, adding to evidence that the broader technology trade is losing altitude.
The weakness was not isolated to one stock or one market. A separate Adalytica S&P 500 Trade Signals snapshot showed neutral sentiment at 53 and awareness at 61, but with the 7-day change still negative, pointing to a market that remains fragile even after recent stabilization. The broader tech selloff has also been feeding into global risk appetite, with chip shares under pressure in Asia and investors growing more defensive across high-beta assets.
For investors, the message is that earnings strength alone is no longer enough to support the most crowded trades if valuation, positioning and macro uncertainty turn against them. That leaves megacap tech, semiconductor suppliers and momentum-focused funds exposed to further volatility if selling persists.
The next test is whether buyers step in around technically oversold levels or whether the weakness broadens into another de-risking wave across the Nasdaq and related growth sectors. Any fresh catalyst from inflation data, interest-rate expectations or company-specific headlines could determine whether Thursday’s slide is a one-day washout or the start of another leg lower.
| Entity | Gains | Losses |
|---|---|---|
| Defensive sectors | ▲Relative inflows | ▼Less capital attention |
| Cash-heavy investors | ▲Buying opportunities | ▼Missed upside if rebound comes |
| Tesla shareholders | ▲None | ▼Steep price drawdown |
| Alphabet shareholders | ▲None | ▼Valuation compression |
