Leading the inflow pack were the Vanguard S&P 500 (VOO), which gained $365 million, and the iPath S&P 500 VIX Short-Term Futures ETN (VXX), which added $317 million. That title belongs to the PureFunds ISE Junior Silver (Small Cap Miners/Explorers) ETF (SILJ), which surged 139.3% year-to-date. Adjusted for inflation, they would see less than 1%, Richard Turnill, BlackRock’s global chief investment strategist, wrote in a research note.