According to @StockMKTNewz, the US stock market started today’s session in the red, signaling a risk-off tone at the open (source: @StockMKTNewz on X, Dec 23, 2025). Short-term crypto–equity correlation tends to rise during equity selloffs, increasing the chance of synchronized intraday moves in BTC and ETH when US indices open weaker (source: Kaiko Research 2024). BTC’s beta to US equities has been positive during macro-driven down days, raising spillover risk to crypto if equity weakness persists (source: Coinbase Institutional research 2024). Liquidity and volume in BTC and ETH are typically highest during US trading hours, which can amplify price impacts from US stock market moves (source: Kaiko Market Structure research 2024).