(2)Whereas Council Directive 93/6/EEC of 15 March 1993 on the capital adequacy of investment firms and credit institutions (6) lays down a standardised method for the calculation of capital requirements for market risks incurred by investment firms and credit institutions; whereas institutions have developed their own risk-management systems (internal models), designed to measure more accurately than the standardised method the market risks incurred by investment firms and credit institutions; whereas the use of more accurate methods of measuring risks should be encouraged;