Wall Street is signaling concern as traders heavily buy disaster puts on the Invesco QQQ ETF, which surged 43% since April. Deep out-of-the-money options, especially October $515 puts aligned with the ETF's 200-day moving average, are in high demand, indicating traders are betting on a significant tech decline. With implied volatility low, investors are increasingly purchasing crash insurance, reflecting fears of a potential tech market downturn amid recent declines and cautionary signals.