The Invesco QQQ Trust (QQQ) closed on January 28th at $521.81, up 1.48%, as the Nasdaq 100 Index rebounded by 1.59% to 21,463.04, driven by investor optimism ahead of earnings reports from major tech companies. This surge comes after a significant selloff on January 27th, triggered by concerns over a new AI model from Chinese startup DeepSeek, which had initially pressured tech valuations. The market's recovery was bolstered by a massive influx of $4.3 billion into the QQQ, marking its largest one-day fund flow since 2021, as investors seized the opportunity to buy the dip. Nvidia, a key player in the AI sector, saw its stock rally nearly 9% after a historic 17% drop, further fueling the tech sector's rebound. Additionally, the Federal Reserve's upcoming decision on interest rates is being closely monitored, with expectations that the central bank will maintain current rates, adding to the cautious optimism in the market.