I presented the original question to Tom Gentile at TA of Stocks & Commodities magazine. Here is his reply:
There are no set rules about options and bankruptcy, but often, the puts will still have value and the out-of-the-money calls will expire worthless. To understand why, lets consider what happens in a bankruptcy. If the options are trading, then shares are probably still listed on one of the stock exchanges. However, when a company files for bankruptcy, the exchange might suspend trading and maybe de-list the stock. When US Airways filed for bankruptcy several years ago, the New York Stock Exchange (NYSE) released a memo stating that the NYSE would suspend trading in the stock because the company said it had filed to reorganize.
A de-listed stock can continue trading on the OTC Bulletin Board (the "Pink Sheets") under a new stock symbol. Shares can be bought or sold through a broker as if it traded on one of the major exchanges.
What about the options? As a rule, the options will trade, but with restrictions. It is not uncommon to see trading limited to closing transactions. If a put owner wants to close out those puts, they can, but no new or "opening" transactions will be allowed. Once de-listed, options on a bankrupt company are limited to closing transactions. Exercise and assignment will involve shares of the bankrupt company, but it might not make sense for a call holder to exercise those calls if the stock has already taken a beating. If shares are trading on the Otc, the put owner has the right to exercise that option contract. The put writer must honor it.
Eventually, the stock certificates might be declared null and void and the stock price drop toward zero. If so, the call options expire worthless and the put options settle for cash. The put owner can exercise the options and receive cash equal to the difference between the option's strike price and the stock price.
Of course, situations can vary. The best source of information regarding a specific holding is your broker. The next reliable source is the Options Clearing Corp. (OCC). Its website will contain information regarding contract adjustments from bankruptcies and other unusual situations. The web address is
www.optionsclearing.com.