Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS August 31, 1998 Expected B Maturity 6/17/02 Blended Coupon 6.5179% Excess Protection Level 3 Month Average 5.49% August, 1998 6.40% July, 1998 5.30% June, 1998 4.77% Cash Yield 19.08% Investor Charge Offs 5.09% Base Rate 7.59% Over 35 Day Delinquency 5.00% Seller's Interest 11.64% Total Payment Rate 14.21% Total Principal Balance $37,775,682,964.86 Investor Participation Amount $706,000,000.00 Seller Participation Amount $4,395,888,446.37