Exhibit 99.39 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-J KEY PERFORMANCE FACTORS February 28, 1999 Expected B Maturity 9/15/2003 Blended Coupon 5.3301% Excess Protection Level 3 Month Average 5.89% February, 1999 5.39% January, 1999 5.94% December, 1998 6.36% Cash Yield17.82% Investor Charge Offs 5.13% Base Rate 7.31% Over 35 Day Delinquency 5.38% Seller's Interest 9.80% Total Payment Rate13.67% Total Principal Balance$40,800,539,305.60 Investor Participation Amount$750,000,000.00 Seller Participation Amount$3,998,619,787.11