Exhibit 99.24 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-D KEY PERFORMANCE FACTORS June 30, 2001 Expected B Maturity 7/15/03 Blended Coupon 5.7196% Excess Protection Level 3 Month Average 7.49% June, 2001 7.03% May, 2001 7.79% April, 2001 7.67% Cash Yield18.98% Investor Charge Offs 5.67% Base Rate 6.28% Over 30 Day Delinquency 4.78% Seller's Interest 8.00% Total Payment Rate14.15% Total Principal Balance$57,876,901,808.74 Investor Participation Amount$559,000,000.00 Seller Participation Amount$4,631,211,247.25