Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS January 31, 1998 Expected B Maturity 6/17/02 Blended Coupon 6.5102% Excess Protection Level 3 Month Average 5.07% January, 1998 4.92% December, 1997 5.29% November, 1997 5.00% Cash Yield 17.84% Investor Charge Offs 4.71% Base Rate 8.22% 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 $706,000,000.00 Seller Participation Amount $5,616,202,234.16