Exhibit 99.25 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS August 31, 2000 Expected B Maturity 10/15/02 Blended Coupon 6.8764% Excess Protection Level 3 Month Average 5.63% August, 2000 5.53% July, 2000 5.97% June, 2000 5.40% Cash Yield 19.15% Investor Charge Offs 4.51% Base Rate 9.11% Over 30 Day Delinquency 4.84% Seller's Interest 10.94% Total Payment Rate 14.32% Total Principal Balance $55,220,806,818.68 Investor Participation Amount $750,000,000.00 Seller Participation Amount $6,039,606,300.19