different investor classthey are not directly comparable. individual investors typically do not have diversified portfolio... Instititutions typically have dozens of investment in the portfolios and they typically have % limit on one investment. the purpose is to diversify risk and reduce single stock risk, altermative goal is to achieve better risk-adjusted return... I thinkin this case the client unlikely to have 20 or 50 investment like UOB at same time, and he also likely use some leverage tools (quite common for short term trade). In one sense, SG market is too thin for institutions to build very large positions (5% disclosure rule). sg players are 大鳄 level, say 100MM to several billion. Those US/UK big names would be 巨鳄，with dozen billion size. And only a few individual investors can pair with these guys.. eg, Warrant Buffet has 10% in China Petro, prince of Saudi has 5% (or 10%) in one big bank. welcome to crocodile world..