Changing Regulatory Capital to Include Liquidity and Management Intervention Available to Purchase

Since 1996, the Bank for International Setdements (BIS) has set the capital level that banks must hold against market risks by a specific formula. This article presents a practical approach for incorporating the effects of asset illiquidity and management response lags in setting regulatory capital levels to account for market risk. According to the BIS guidelines, capital should be a function of the effectiveness of limit management and market liquidity, because actively managing limits and positions can significantly reduce the risk of a trading operation. Although this approach represents an improvement over previous methods of setting capital, significant limitations still remain, namely, liquidity constraints and response lags in management intervention, which increase portfolio risk. The authors suggest specific amendments to the reg‐ulatory capital guidelines that may mitigate both of these limitations