The Bombay Stock Exchange benchmark Sensex declined by over 88 points to 20,252 in the opening trade today. It further declined in the afternoon trade and is trading 190 points down at 20149. This follows investors and funds booking profits at prevailing higher levels amid weak trend in Asian region. Stocks of oil and gas, capital goods and realty sectors were under pressure. Similarly, the wide-based National stock Exchange index Nifty, too, shed 62 points to 6072 in the noon trade.