Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS July 31, 1998 Expected B Maturity 6/17/02 Blended Coupon 6.5193% Excess Protection Level 3 Month Average 5.02% July, 1998 5.30% June, 1998 4.77% May, 1998 5.01% Cash Yield 18.75% Investor Charge Offs 5.14% Base Rate 8.31% Over 35 Day Delinquency 4.90% Seller's Interest 15.22% Total Payment Rate 14.52% Total Principal Balance $37,740,921,726.81 Investor Participation Amount $706,000,000.00 Seller Participation Amount $5,743,527,208.32