According to @StockMKTNewz, the U.S. stock market opened the final trading day of the year in the red, signaling a risk-off start to December 31, 2025 (Source: @StockMKTNewz on X, Dec 31, 2025). Research shows Bitcoin and U.S. equities have exhibited stronger return correlations since 2020, increasing the likelihood of cross-asset moves when stocks weaken (Source: IMF, Crypto Prices Move with Equity Markets, 2022; BIS, Quarterly Review analysis on crypto–macro linkages, 2022). Crypto traders should monitor BTC and ETH price action around the U.S. cash session for potential spillovers consistent with these documented correlations (Source: IMF 2022; BIS 2022).