Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-M KEY PERFORMANCE FACTORS JANUARY, 1999 Expected B Maturity 12/15/06 Blended Coupon 5.5642% Excess Protection Level 3 Month Average 5.66% January, 1999 5.41% December, 1998 5.97% November, 1998 5.58% Cash Yield 18.25% Investor Charge Offs 4.95% Base Rate 7.89% Over 35 Day Delinquency 5.29% Seller's Interest 8.19% Total Payment Rate 14.12% Total Principal Balance $ 40,086,865,639.98 Investor Participation Amount $ 500,000,000.00 Seller Participation Amount $ 3,284,946,121.49