Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-J KEY PERFORMANCE FACTORS January 31, 1998 Expected B Maturity 9/15/04 Blended Coupon 5.7645% Excess Protection Level 3 Month Average 5.00% January, 1998 4.85% December, 1997 5.22% November, 1997 4.94% Cash Yield 17.84% Investor Charge Offs 4.71% Base Rate 8.29% Over 35 Day Delinquency 4.85% Seller's Interest 16.09% Total Payment Rate 13.52% Total Principal Balance $34,907,536,752.65 Investor Participation Amount $750,000,000.00 Seller Participation Amount $5,616,202,234.16