Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS February 28, 1998 Expected B Maturity 6/17/02 Blended Coupon 6.5146% Excess Protection Level 3 Month Average 4.99% February, 1998 4.74% January, 1998 4.92% December, 1997 5.29% Cash Yield 16.74% Investor Charge Offs 4.83% Base Rate 7.17% Over 35 Day Delinquency 5.04% Seller's Interest 15.07% Total Payment Rate 12.54% Total Principal Balance $34,488,564,555.67 Investor Participation Amount $706,000,000.00 Seller Participation Amount $5,197,230,037.18