S&P 500 Erases 2015 Gain Amid Global Stock Rout; Treasuries Jump

The Standard & Poor’s 500 Index slid the most since April 2014 and erased its gain since January, while European shares suffered their worst day this year as concern mounted that Greece will exit the euro. Treasuries advanced with the yen and gold as investors sought out haven assets.

The S&P 500 sank 2.1 percent by 4 p.m. in New York, with a measure of equity volatility surging the most since April 2013, breaking a streak of calm in U.S. markets. The Stoxx Europe 600 Index dropped 2.7 percent, the most since Oct. 15, as Germany’s DAX Index capped its worst session since November 2011. The MSCI All-Country World Index slumped 2.2 percent for its biggest slide since June 2013. Yields on 10-year Treasuries sank 15 basis points to 2.33 percent. The euro weakened against the yen and rallied versus the dollar. Gold rose 0.5 percent.