[Vanda: Retail Investors Net Buy $111 Million Worth of Nvidia Stock in the First Half Hour After Opening, Setting a New Record] Odaily Planet Daily reports that financial market research firm Vanda: Retail investors made a net purchase of $111 million worth of Nvidia (NVDA.O) stock in the first half hour after the market opened, setting a new record for the largest net purchase by retail investors in the opening phase of the stock's history.