helios & matheson at nse on november 20, 2008 last:21.15 high:21.90 low:20.30 volume:17,302 52-wk high:150 nifty: 2,553.15        helios & matheson at bse on november 20, 2008 last:21.40 high:21.75 low:19.25 volume:13,745 52-wk high:150 sensex: 8,451.01