Exhibit 99.20 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS September 30, 2000 Expected B Maturity 6/17/02 Blended Coupon 6.6651% Excess Protection Level 3 Month Average 5.87% September, 2000 5.84% August, 2000 5.65% July, 2000 6.11% Cash Yield 19.26% Investor Charge Offs 4.49% Base Rate 8.92% Over 30 Day Delinquency 4.99% Seller's Interest 8.50% Total Payment Rate 13.85% Total Principal Balance $54,293,652,263.17 Investor Participation Amount $706,000,000.00 Seller Participation Amount $4,612,451,744.68