BUZZ-Shares of two Saudi SABIC units diverge after Q2 earnings

July 24 (Reuters) - ** Shares in two Saudi Basic Industries Corp units diverge: Saudi Kayan Petrochemical rises 3.6 percent to 7.25 riyals, Saudi Arabian Fertilizers Co (SAFCO) falls 0.4 percent to 59.25 riyals ** Kayan swung to net profit in second quarter of 91.02 million riyals ($24. ...