In January this year, we allowed companies to issue shares with inbuilt optionality clause where the issuer of shares writes a put option so that the investor can exit at the specified time by selling the share to the issuer.
The key feature is that the sale would take place not at a pre-determined price but at the “fair price” prevailing at the time of exit. An option without a predetermined strike price may seem to be a bit of a problem, but there is a logic behind it.