When I signed up for IB I had to check a box that permits IB to loan out my shares for a small fee. I'm not sure if a broker can loan out a client's shares wit

When I signed up for IB I had to check a box that permits IB to loan out my shares for a small fee. I'm not sure if a broker can loan out a client's shares without the client's approval. It may be fine print in the TOS, though.