Nice to see SEC cracking down... Bottom line is it will become difficult, if not impossible, to buy any listed Security like IHSI, and maybe even difficult to liquidate it. TD and other brokers will usually still liquidate at close to zero for a fee just so you can take the tax loss. Here's some more info: https://www.wyrick.com/news-insights/sec-adopts-amendments-to-rule-15c2-11-most-provisions-effective-september-26-2021 See the "practical takeaways" section.