MUMBAI, SEPT 1: Share values suffered a further setback today on the Bombay Stock Exchange (BSE), pushing down the Sensex by 74 points mainly on profit-taking in heavy-weighted counters. The bull liquidation which began on Tuesday continued for the second consecutive day on Wednesday as operators unloaded shares following the BSE decision to impose additional carryforward margins.Sensex fell from the day's high of 4914.12 to 4813.54, before closing at 4824.44 with a net loss of 73.77 points as against the previous close of 4898.21. The BSE-100 index declined sharply by 39.70 points to 2192.94 as against the previous close of 2153.24.Barring select scrips like Bajaj Auto, ITC, Global Telecom and others, most of the pivotals attracted selling pressure. ``The market was in an overbought position and it suffered a technical correction in the last two days,'' said a broker. Moreover, the BSE authorities announced a series of measures, including tightening of scrip wise limits and a hike in additionalcarry-forward margins to avoid any excessive speculative activity. However, this dampened the market sentiment.Of the 148 traded specified scrips, 120 showed sharp to marginal losses while 27 gained and one remained unchanged. Only six out of 30 index-based shares survived the bear onslaught and closed in the positive territory. The total volume of business at Rs 2059.87 was remarkably lower than Rs 2233.22 crore registered yesterday.Meanwhile on the NSE, share prices declined further on the first day of the current settlement on increased selling pressure. Foreign institutional investors (FIIs) were also hesitant and made small purchases in select counters. The S&P CNX Nifty opened marginally higher at 1412.05, but reacted towards the fag-end and closed at 1410.70, showing a moderate fall of 1.30 over the last close of 1412.