Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS May 31, 1998 Expected B Maturity 6/17/02 Blended Coupon 6.5190% Excess Protection Level 3 Month Average 5.61% May, 1998 5.01% April, 1998 5.94% March, 1998 5.87% Cash Yield 17.95% Investor Charge Offs 5.01% Base Rate 7.92% Over 35 Day Delinquency 5.17% Seller's Interest 13.80% Total Payment Rate 13.68% Total Principal Balance $35,599,996,121.04 Investor Participation Amount $706,000,000.00 Seller Participation Amount $4,911,601,602.55