Futures for the Dow Jones Industrial Average Wednesday evening were down, following the sharpest one-day decline for the Dow since February. The DowDJIA, -3.15% ended Wednesday’s session off more than 830 points, or 3.2%, representing the ugliest day since Feb. 8 when both the Dow and the S&P 500 index fell into correction territory, defined as a decline of at least 10% from a recent peak. The momentum appeared to follow through to futures trading, with Dow futures YMZ8, -0.45% down 0.3% at 25,437. To be sure, the futures market doesn’t always reflect trading action in the coming session because volumes tend to be thinner, and it makes sense that selling might continue after one of the roughest sessions in months. A popular way to bet on the Dow, the SPDR Dow Jones Industrial Average ETF Trust DIA, -3.09% was off 0.7% in after-hours trade. Futures for the S&P 500 index ESZ8, -0.29% were down 0.3% at 2,772, while those for the Nasdaq-100 NQZ8, -0.41% were off 7,003.25, a fall of 0.4%. The S&P 500 SPX, -3.29% ended Wednesday down 3.3% for its worst session since February, while the Nasdaq Composite IndexCOMP, -4.08% marked its steepest single-session decline, off 4.1%, at 7,422, since the day of Brexit on June 24 of 2016. Rising government bond yields have been widely cited as one key reason for the flight out of assets perceived as risky. The 10-year Treasury note yield TMUBMUSD10Y, -0.03% was at 3.20%, hovering around its highest level since 2011. Richer yields equate to higher borrowing costs for corporations and individuals and can force a reassessment of asset values. Worries about coming rate increases by the Federal Reserve and tariffs also combined to shake investor confidence.