With the S&P 500 on pace for its second straight week of gains, investors are feeling a little more positive about the market. According to the American Association of Individual Investors, bullish sentiment increased from 30.3% to 42.0%. This is the largest weekly reading since 5/23 and the largest one-week increase since 3/14. Judging by this morning's pre-market futures, investors were right to turn more bullish. Now, let's hope the gains hold.