Exhibit 99.50 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-F KEY PERFORMANCE FACTORS August 31, 2000 Expected B Maturity 6/15/2005 Blended Coupon 6.9503% Excess Protection Level 3 Month Average 4.05% August, 2000 5.49% July, 2000 2.60% June, 2000 N/A Cash Yield19.18% Investor Charge Offs 4.51% Base Rate 9.18% Over 30 Day Delinquency 4.84% Seller's Interest10.94% Total Payment Rate14.32% Total Principal Balance$55,220,806,818.68 Investor Participation Amount$882,400,000.00 Seller Participation Amount$6,039,606,300.19