The market had its biggest one-day loss in three and a half months, smashing through the 640 technical support level. The index fell to as low as 633 in the afternoon and closed down 12.33 points, or 1.9%, to 636.05, for its third day of declines to its lowest level since June 30. Financials, which helped lead the market's surge to 681 last month, have rolled over. VCB (-2.8%), which is down 10.4% from a record high on July 13,