The appetite for risk has increased over the past month with small-caps, mid-caps and micro-caps leading the market higher. The PerfChart below shows one-month performance for the S&P 500 SPDR (red) and seven other broad market index ETFs. The S&P MidCap SPDR (green), S&P SmallCap iShares (pink) and Russell 2000 iShares (teal) are outperforming SPY with bigger gains. The Nasdaq 100 ETF (black) is lagging with the smallest gain of the group. The Russell MicroCap iShares (purple) is the clear leader with a 6.07% gain over the past month.