Russian blue chips not only dropped but also advanced to levels higher thanyesterday's closing amid a fall in US stock indices and retreating worldoil prices. In the first 30 minutes of the trade at the Russian TradingSystem, only LUKoil and Rostelecom securities eased back by 0.5 percent.The market's leader is still Surgutneftegaz. Its preferred shares haveadded almost 1.15 percent. At the same time the RTS index fell by 0.1percent to 328.59 points. The volume of trade has been traditionally lowand amounted to some $3m..