Dow Jones futures improved marginally on Sunday evening, along with S&P 500 futures and Nasdaq futures. The key indices retreated modestly in the previous week but retained crucial levels even as Federal Reserve policymakers suggested a possibility of huge rate hikes. Dow Jones futures rose by 0.2% against the fair value. S&P 500 futures gained 0.2%, while Nasdaq 100 futures improved by 0.3%.