According to @StockMKTNewz, the post contrasts the stock market at the open versus the close, highlighting frequent intraday swings and visualizing sentiment shifts between the opening range and the closing auction (source: @StockMKTNewz). U.S. equities typically exhibit a U-shaped intraday volume pattern with the highest activity and volatility clustering at the open and close, increasing whipsaw risk for intraday traders (source: NYSE market data). Practical setups include managing risk around the opening range, using VWAP for mean-reversion or trend confirmation, and tracking end-of-day imbalance prints into the Closing Cross to navigate late-session reversals (source: Nasdaq Closing Cross and NYSE auction methodology). Because U.S. equity moves often transmit to digital assets in the late U.S. session, monitoring BTC and ETH around the 3:50–4:00 p.m. ET auction window can improve crypto risk management on high-beta days (source: Kaiko correlation research and U.S. market auction schedules).