Loss of Velocity

STI had its biggest sell-off today, with 39.85 points or 1.2%  decline-- not seen since beginning of this year( its biggest loss so far this year was on 3/1/14 with 1.4% down).  Broke its 10-week low today, close at 3272.62. Immediate support is at 3260-3234 which it hit on 1 Jul.