Investors are continuing to invest billions in the Nasdaq-100 ETF QQQ, regardless of concerns about cheaper alternatives from BlackRock and State Street. On October 20, NVIDIA dominated sales from the INVESCO QQQ Trust. The ProShares UltraPro QQQ (TQQQ) stock price and history were updated on Yahoo Finance Canada. A humorous post on Moomoo expressed amazement at recent market instability. The Invesco QQQ Trust ETF experienced a slide today, with Investing.com India analyzing the reasons. Lam Research, Applied Materials, and ASML Holding saw substantial drops due to supply limitations. Benzinga provided trading strategies for SPY, QQQ, AAPL, MSFT, NVDA, GOOGL, META, and TSLA amid rising oil prices and AI concerns.