Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-F KEY PERFORMANCE FACTORS February 28, 2001 Expected B Maturity 9/15/05 Blended Coupon 6.6762% Excess Protection Level 3 Month Average 4.52% February, 2001 6.65% January, 2001 6.37% December, 2000 0.56% Cash Yield19.53% Investor Charge Offs 4.62% Base Rate 8.26% Over 30 Day Delinquency 5.13% Seller's Interest 8.26% Total Payment Rate13.44% Total Principal Balance$57,174,868,500.05 Investor Participation Amount$500,000,000.00 Seller Participation Amount$4,724,177,938.56