Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-D KEY PERFORMANCE FACTORS August 31, 1999 Expected B Maturity 05/15/01 Blended Coupon 5.4518% Excess Protection Level 3 Month Average 5.73% August, 1999 5.98% July, 1999 6.01% June, 1999 5.20% Cash Yield 18.20% Investor Charge Offs 4.78% Base Rate 7.45% Over 30 Day Delinquency 4.81% Seller's Interest 7.19% Total Payment Rate 14.37% Total Principal Balance $46,158,397,644.87 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $3,316,578,126.38