Exhibit 99.27 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-I KEY PERFORMANCE FACTORS May 31, 1999 Expected B Maturity 8/16/04 Blended Coupon 6.3747% Excess Protection Level 3 Month Average 6.55% May, 1999 7.66% April, 1999 5.22% March, 1999 6.78% Cash Yield19.45% Investor Charge Offs 4.88% Base Rate 6.91% Over 30 Day Delinquency 4.89% Seller's Interest 6.97% Total Payment Rate14.69% Total Principal Balance$41,914,776,221.36 Investor Participation Amount$750,000,000.00 Seller Participation Amount$2,922,256,702.87