On January 30, 2025, the Nasdaq-100 ETF ($QQQ) and the S&P 500 ETF ($SPY) experienced significant upward movements in pre-market trading, suggesting a potential effort to fill a gap from the previous Monday. Observers noted the rapid recovery of the markets, characterized by a 'V shape' bounce, indicating a strong rebound after earlier declines. By January 31, it was confirmed that the substantial gap in the $SPY had been filled, while the $QQQ was close to filling its gap as well. This pattern of market behavior has been described as indicative of robust market strength.