That’s the longest run of declines in the futures since just before the presidential election, when Donald Trump’s victory unleashed a stock-buying spree that drove U.S. markets to all-time highs. Volumes are also picking up, with the most e-mini contracts changing hands this year on March 1. The retreat, which marks a drop of 1.7 percent from the futures’ 2017 peak, comes as investors brace for a daunting run of potential catalysts, with Thursday’s European Central Bank meeting, U.S. payrolls a day later and then the Federal Reserve’s policy review.