Small-cap stocks are set to outperform, according to Goldman research showing the IWM outperforms the SPY by an annualized 8.1% in quarters following a steep drop in the VIX. The "acute" decline in the VIX YTD "provides a tailwind to small-cap performance in 2Q13." A must-read for small cap index fans is SA author Ploutos' piece suggesting IJR is your best bet.