Oct. 13 1999 3:30 AM

RCROF continues its surge. This stock, which pays off only if a candidate other than Bush, Forbes, or Dole wins the Republican nomination, climbed nearly to 20 cents over the weekend--a new record--thanks to a high-volume trading session of 523 shares Sunday. A month ago, this stock was trading at a mere 11.5 cents. Meanwhile, Bush's share price has slid two cents in two days. Though he remains well ahead, the Iowa market may be sending him a warning.