Futures margin and excess volatility
Margin requirements, margin loans, and margin rates: practice and principles
The Board of Governors of the Federal Reserve System establishes initial margin requirements under Regulations T, U, and X. Recent margin loan increases, both in aggregate value and relative to market capitalization, have rekindled the debate about using margin requirements as an instrument to affect the prices of common stocks. Proponents of a more active margin requirement policy see the regulations as instruments for affecting the level and volatility of stock prices by influencing investors' demand for common stocks. Others believe that the announcement effects of increased margin ...