Exhibit 99.31 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-F KEY PERFORMANCE FACTORS July 31, 2000 Expected B Maturity 9/15/05 Blended Coupon 6.8890% Excess Protection Level 3 Month Average 5.71% July, 2000 6.01% June, 2000 4.87% May, 2000 6.23% Cash Yield19.26% Investor Charge Offs 4.57% Base Rate 8.68% Over 30 Day Delinquency 4.81% Seller's Interest11.87% Total Payment Rate14.13% Total Principal Balance$55,010,319,976.67 Investor Participation Amount$500,000,000.00 Seller Participation Amount$6,529,119,458.18