Exhibit 99.39 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-J KEY PERFORMANCE FACTORS March 31, 1999 Expected B Maturity 9/15/2003 Blended Coupon 5.3304% Excess Protection Level 3 Month Average 6.01% March, 1999 6.69% February, 1999 5.39% January, 1999 5.94% Cash Yield19.18% Investor Charge Offs 5.12% Base Rate 7.37% Over 35 Day Delinquency 4.94% Seller's Interest 6.34% Total Payment Rate14.77% Total Principal Balance$40,628,355,078.94 Investor Participation Amount$750,000,000.00 Seller Participation Amount$2,576,435,560.45