US stock futures rallied on Monday after President Trump signed a $900 billion Covid-19 aid bill, putting an end to uncertainty over the rollout of the package and the stimulus checks. Futures tied to the S&P 500 gained 0.6%, as investors expect new fiscal spending to offer aid to consumers and small businesses. Elsewhere, the pan-continental Stoxx Europe 600 advanced 0.6%, while Japan's Nikkei 225 rose 0.7%.