Exhibit 99.11 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-B KEY PERFORMANCE FACTORS September 30, 1999 Expected B Maturity 4/17/06 Blended Coupon 5.6853% Excess Protection Level 3 Month Average 5.82% September, 1999 5.71% August, 1999 5.86% July, 1999 5.88% Cash Yield 18.00% Investor Charge Offs 4.60% Base Rate 7.69% Over 30 Day Delinquency 4.90% Seller's Interest 6.99% Total Payment Rate 14.16% Total Principal Balance $45,780,732,257.76 Investor Participation Amount $500,000,000.00 Seller Participation Amount $3,198,912,739.27