There is a growing push from retail traders, international investors, and a few big hedge funds to do something once unthinkable: keep stock markets open for 24 hours a day, 7 days a week. But when do traders sleep if Wall Street never shuts?

On today’s Big Take podcast, Bloomberg finance reporter Katherine Doherty joins host Sarah Holder to break down what’s behind the growing demand for after-hours trading on platforms like Robinhood, whether regulators will ever approve such a move, and what happens to the opening bell if the New York Stock Exchange never closes.

Read more: 24-Hour Stock Trading Is Booming – and Wall Street Is Rattled