Exhibit 99.39 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-J KEY PERFORMANCE FACTORS May 31, 1999 Expected B Maturity 9/15/2003 Blended Coupon 5.3280% Excess Protection Level 3 Month Average 6.39% May, 1999 7.23% April, 1999 5.27% March, 1999 6.69% Cash Yield19.45% Investor Charge Offs 4.88% Base Rate 7.34% Over 30 Day Delinquency 4.89% Seller's Interest 6.97% Total Payment Rate14.69% Total Principal Balance$41,914,776,221.36 Investor Participation Amount$750,000,000.00 Seller Participation Amount$2,922,256,702.87