Investors are continuing to invest billions in the Nasdaq-100 ETF QQQ, notwithstanding concerns about cheaper alternatives from BlackRock and State Street. On October 20, NVIDIA topped sales from the INVESCO QQQ Trust. The ProShares UltraPro QQQ (TQQQ) stock price and history were revised on Yahoo Finance Canada. A humorous post on Moomoo expressed surprise at recent market turbulence. The Invesco QQQ Trust ETF underwent a slide today, with Investing.com India investigating the reasons. Lam Research, Applied Materials, and ASML Holding saw major 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.