SOROS LIFTS KING WORLD <KWP> STAKE TO 8.1 PCT New York investor George Soros, and an investment fund he controls, said they raised their stake in King World Productions Inc to 2,485,510 shares, or 8.1 pct of the total outstanding, from 1,986,710 shares, or 6.5 pct. In a filing with the Securities and Exchange Commission, Soros said his group bought a net 498,800 King World common shares between Jan 8 and March 6 at prices ranging fropm 18.924 to 21.203 dlrs a share.