P527 ORACLE 527 Sat29 Jul C4 2200:01   NOMURA MAY BE  LOSING SOME CLOUT Is Nomura, the top-notch Japanese broker and the world's biggest securities house, losing its touch? Well, analysts in Tokyo think it has lost some of its clout. On a good day Nomura used to account for 30% of Tokyo's trading volume but its daily share is now half that amount Recent low volume has hit big brokers hardest and according to one Tokyo fund manager when Nomura moves now not all institutions will follow. City headlines 500 Newsfile 520 ORACLE RACING CLUBS See p688 Next Story Units Your Money Diversions