David Lau (also known as David Luu), of Santa Rosa, California, a stockbroker registered with Morgan Stanley, has been fined $6,000.00 and suspended for twenty days from associating with any Financial Industry Regulatory Authority (FINRA) member in any capacity because Lau engaged in unauthorized trading. Letter of Acceptance, Waiver, and Consent No. 2021070917301 (November 18,…