Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-M KEY PERFORMANCE FACTORS APRIL, 1998 Expected B Maturity 12/15/06 Blended Coupon 5.8192% Excess Protection Level 3 Month Average 5.48% April, 1998 5.92% March, 1998 5.86% February, 1998 4.66% Cash Yield 18.70% Investor Charge Offs 4.96% Base Rate 7.82% Over 35 Day Delinquency 5.03% Seller's Interest 14.63% Total Payment Rate 14.61% Total Principal Balance $ 35,947,972,379.88 Investor Participation Amount $ 500,000,000.00 Seller Participation Amount $ 5,259,577,861.39