Exhibit 99.31 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-J KEY PERFORMANCE FACTORS February 28, 2001 Expected B Maturity 9/15/2003 Blended Coupon 5.3681% Excess Protection Level 3 Month Average 5.78% February, 2001 7.52% January, 2001 7.59% December, 2000 2.23% Cash Yield19.48% Investor Charge Offs 4.62% Base Rate 7.34% 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$750,000,000.00 Seller Participation Amount$4,724,177,938.56