I was reading about the illiquid fee policies of a stock broker: https://www.firstrade.com/content/en-us/customerservice/faqs/illiquidfees/. Excerpt:
Your sale of a low-priced security may be reversed with a forced buy-in executed at the current market price, leading to potential large losses.
What does this mean? Suppose I used to own 100 shares of an OTC stock which I then sold. Does it mean that my stock broker can force me to buy back the 100 shares at a potentially unfavorable price at any time? Why does the broker need to do this?