Gate Provision

The 2015 movie The Big Short follows three separate stories of investors and hedge fund managers. Christian Bale plays fund manager Michael Burry, who takes an investment risk in betting against mortgage-backed securities. His clients become unhappy with their large monthly payments and want whatever is left of their many back; they demand he sell, Mortimer, sell. But he refuses. He restricts his investors from withdrawing their money.

What Burry does is invoke the gate provision in his contracts with clients; he doesn’t allow them to cash in their investments before it's too late. Because of his actions, Burry’s clients no longer had faith or trust in him. He had a gate provision which he exercised and, well, you'll have to see the movie to know how it ends.