Sensex was trading 200 points down at 21,038 points a shortwhile ago. Snapping its five-day rising streak, Sensex lost nearly 105 points, to 21,134, in early trade today, as funds and retail investors booked profits amid a mixed trend in other Asian markets. The 30-share index had gained around 670 points in the previous five sessions. The Nifty at the National Stock Exchange was also trading 52 points down at 6,266 a shortwhile ago.