Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-M KEY PERFORMANCE FACTORS APRIL, 1997 Expected B Maturity 12/15/06 Blended Coupon 5.7096% Excess Protection Level 3 Month Average 5.06% April, 1997 4.02% March, 1997 5.83% February, 1997 5.34% Cash Yield 16.27% Investor Charge Offs 4.55% Base Rate 7.71% Over 35 Day Delinquency 4.27% Seller's Interest 20.02% Total Payment Rate 12.21% Total Principal Balance $ 27,182,850,184.68 Investor Participation Amount $ 500,000,000.00 Seller Participation Amount $ 5,443,222,666.19