September is been rather unkind to mid-caps, small-caps and micro-caps, but large-caps and large-cap techs are holding up ok. The PerfChart below shows the Dow Industrials with a small gain this month, the S&P 500 with a 1% loss and the Nasdaq 100 with a .71% loss. The situation then deteriorates as we move down in market-cap. The DJ Wilshire Micro-Cap Index is down the most with a 5.09% loss this month. Note: this PerfChart does not include data for today, 29-Sept. Click the image for a live PerfChart.