as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
why would someone want to buy an option on the day of expiry
user
yes there will be enough liquidity to sell your position barring some sort of flash crash anomaly. volume generally rises on the day of expiration to increase this liquidity. don't forget that there are many investment strategies--buying to cover a short position is closing out a trade similar to your case.
assistant