According to @StockMKTNewz, there are only 16.5 trading days left in 2025, signaling a compressed year-end window for positioning, rebalancing, and tax planning. Source: @StockMKTNewz on X, Dec 6, 2025. For U.S. securities, capital gains and losses are determined by the trade date within the calendar year, and the wash sale rule disallows claiming a loss if substantially identical stock or securities are repurchased within 30 days, shaping December execution timing. Source: IRS Publication 550 and IRS Form 8949 Instructions. Monthly options expiration occurs on the third Friday and can concentrate dealer hedging flows that influence equity index levels into year-end. Source: Cboe options expiration calendar and Cboe education materials. Crypto markets such as BTC and ETH trade 24/7, and research documents rising crypto–equity correlation, so year-end equity flows and OPEX can spill over into crypto volatility and liquidity. Source: International Monetary Fund research on increased crypto–equity co-movement, 2022. U.S. settlement shortened to T+1 effective May 28, 2024, changing operational timelines but taxes remain keyed to the trade date. Source: U.S. Securities and Exchange Commission final rule on T+1 settlement and IRS Publication 550.