Margin Deficiency [Banks & Banking] Law and Legal Definition
According to 12 CFR 220.2 [Title 12 -- Banks and Banking; Chapter II -- Federal Reserve System; Subchapter A -- Board of Governors of the Federal Reserve System; Part 220 -- Credit by Brokers and Dealers (Regulation T)], margin deficiency means “the amount by which the required margin exceeds the equity in the margin account.”