Exhibit 99.31 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-F KEY PERFORMANCE FACTORS August 31, 2000 Expected B Maturity 9/15/2005 Blended Coupon 6.8890% Excess Protection Level 3 Month Average 5.49% August, 2000 5.58% July, 2000 6.01% June, 2000 4.87% Cash Yield19.19% Investor Charge Offs 4.51% Base Rate 9.10% 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$500,000,000.00 Seller Participation Amount$6,039,606,300.19