Stock futures edged higher early Monday as markets entered the shortened Thanksgiving week with cautious optimism. Trading volumes are expected to lighten, with U.S. exchanges closed Thursday and operating on a half-day schedule Friday. At 3:39 a.m. EST, Nasdaq 100 futures were up 0.99%, S&P 500 futures gained 0.68%, and The positive tone followed a mixed finish last week, when strong earnings partly offset renewed volatility across technology and cryptocurrency markets. The S&P 500 rose 0.98% over the we ...