The technology-heavy Nasdaq Composite fell nearly 3 percent to its lowest since October 2014, weighed down by Microsoft, Amazon and Facebook, while the Dow Jones industrial average shed more than 350 points. “Equities are in a ‘go-nowhere-fast’ mode, with a downward bias in the near term,” said Terry Sandven, chief equity strategist at U.S. Bank Wealth Management in Minneapolis. Crude oil prices eased from their session lows, but were still down about 1 percent.