Exhibit 99.15 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-C KEY PERFORMANCE FACTORS July 31, 1997 Expected B Maturity 4/16/01 Blended Coupon 5.8567% Excess Protection Level 3 Month Average 4.65% July, 1997 4.56% June, 1997 4.90% May, 1997 4.49% Cash Yield 17.53% Investor Charge Offs 4.92% Base Rate 8.05% Over 35 Day Delinquency 4.47% Seller's Interest 18.18% Total Payment Rate 14.22% Total Principal Balance $30,179,392,749.44 Investor Participation Amount $500,000,000.00 Seller Participation Amount $5,486,155,230.95