INVESTMENT FIRM RAISES TVX <TVXG.O> STAKE WEDGE Group Inc, a Houston investment firm, said it raised its stake in TVX Broadcast Group Inc to 682,419 shares, or 15.1 pct of the total outstanding common stock, from 559,219 shares, or 12.4 pct. In a filing with the Securities and Exchange Commission, WEDGE said it bought 123,200 TVX common shares at prices ranging from 8.00 to 10.625 dlrs a share.