Selling the put obligates you to buy stock at strike price A if the option is assigned.
When selling puts with no intention of buying the stock, you want the puts you sell to expire worthless. This strategy has a low profit potential if the stock remains above strike A at expiration, but substantial potential risk if the stock goes down. The reason some traders run this strategy is that there is a high probability for success when selling very out-of-the-money puts. If the market moves against you, then you must have a stop-loss plan in place. Keep a watchful eye
on this strategy as it unfolds.