The BSE benchmark Sensex recovered by nearly 33 points in early trade today on fresh buying by funds and retail investors amid a firm trend on other Asian bourses following overnight gains on the US markets. The 30-share index, which had lost over 59 points in the previous session, recovered by 0.16 per cent, to 20,580 points in early trade with realty, healthcare and oil and gas sector stocks leading the gains.On similar lines, the wide-based National Stock Exchange index Nifty moved up more than 12 points, to 6,101points.