. But after alerting the online brokerage to what she believed was a theft in progress, she received a frustrating email. Because the wildly popular app has no emergency phone number, some said they tried in vain to intervene, only to watch helplessly as their money vanished. Two of those customers said they have heard back from an official at the SEC seeking more information. Finra and the SEC declined to comment. Robinhood, founded seven years ago and based in Menlo Park, California, has exploded in popularity this year as millions of Americans stuck at home -- including throngs of millennials -- look to make some money during a pandemic that has sent stock prices swinging. But the no-fee brokerage app has also attracted consumer complaints, with novice investors confused by the vagaries of stock options and margin loans. His bet on Netflix Inc. 