IB pays interest on the entire balance, not just the part under $10,000, if you invest free cash by shorting EFPs. The amount paid for shorting EFPs is greater than the interest any broker will pay on cash.
IB pays interest on the entire balance, not just the part under $10,000, if you invest free cash by shorting EFPs. The amount paid for shorting EFPs is greater than the interest any broker will pay on cash.