The Sensex at the Bombay Stock Exchange was trading 30 points in the positive territory, at 16,906, in late morning deals. The 30-share barometer recovered by 73 points in its opening session after recent losses on emergence of buying by funds and retail investors at prevailing levels. In a Similar fashion, the wide-based National Stock Exchange index Nifty also moved 11 points, up to over 5,128.