Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-D KEY PERFORMANCE FACTORS December 31, 1998 Expected B Maturity 05/15/01 Blended Coupon 5.7185% Excess Protection Level 3 Month Average 5.85% December, 1998 5.83% November, 1998 5.73% October, 1998 5.99% Cash Yield 18.72% Investor Charge Offs 4.98% Base Rate 7.91% Over 35 Day Delinquency 4.96% Seller's Interest 10.83% Total Payment Rate 13.62% Total Principal Balance $41,270,703,888.09 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $4,468,784,369.60