The Financial Industry Regulatory Authority (FINRA) recently voted to overhaul the Pattern Day Trading (PDT) rule, which required a $25,000 minimum account balance to execute four or more same-day trades in five business days. The new rule, pending final approval by the SEC, would shift to a standard intraday margin framework. This could unleash a retail trading boom, boosting volumes in volatile penny stocks and the platforms enabling them. While penny stocks may see action, brokerages and retail favorites ...