Exhibit 99.26 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-F KEY PERFORMANCE FACTORS February 28, 1999 Expected B Maturity 6/17/02 Blended Coupon 6.4120% Excess Protection Level 3 Month Average 5.97% February, 1999 6.15% January, 1999 5.86% December, 1998 5.91% Cash Yield 17.82% Investor Charge Offs 5.13% Base Rate 6.55% Over 35 Day Delinquency 5.38% Seller's Interest 9.80% Total Payment Rate 13.67% Total Principal Balance $40,800,539,305.60 Investor Participation Amount $706,000,000.00 Seller Participation Amount $3,998,619,787.11