Exhibit 99.28 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-I KEY PERFORMANCE FACTORS September 30, 1997 Expected B Maturity 8/16/04 Blended Coupon 6.4847% Excess Protection Level 3 Month Average 2.71% September, 1997 2.71% August, 1997 N/A July, 1997 N/A Cash Yield 17.31% Investor Charge Offs 4.36% Base Rate 10.25% Over 35 Day Delinquency 4.84% Seller's Interest 12.31% Total Payment Rate 12.46% Total Principal Balance $30,549,822,447.26 Investor Participation Amount $750,000,000.00 Seller Participation Amount $3,759,687,928.77