Not true. When a firm is in Chapter 11, its stock will still have value, but there is a temporary trading freeze. Although the stock will be delisted, over the counter (OTC) trading may still occur.
The equity a broker has invested in the firm is not valued at zero, but their true value cannot be easily determined.
When a company that is going through bankruptcy proceedings is listed on the pink sheets or OTCBB, the letter "Q" is added to the end of the company's ticker symbol to differentiate it from other companies.
but the existing common shareholders and debt holders are now wiped out.