Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-D KEY PERFORMANCE FACTORS May 31, 1998 Expected B Maturity 05/15/01 Blended Coupon 5.8393% Excess Protection Level 3 Month Average 5.53% May, 1998 4.90% April, 1998 5.86% March, 1998 5.82% Cash Yield 17.95% Investor Charge Offs 5.01% Base Rate 8.03% Over 35 Day Delinquency 5.17% Seller's Interest 13.80% Total Payment Rate 13.68% Total Principal Balance $35,599,996,121.04 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $4,911,601,602.55