On Tuesday, Singaporean billionaire Leo KoGuan purchased 1 million shares of Nvidia (NVDA.US) and expressed his intention to acquire more, according to Bloomberg.Nvidia closed at USD180.05 on the New York stock market on Tuesday, meaning that the value of 1 million shares was USD180 million.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)Related NewsInitial Jobless Claims for Feb/28 in United States is 213K, unchanged from its last period. The forecast was 215K.