Exhibit 99.24 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-D KEY PERFORMANCE FACTORS May 31, 2001 Expected B Maturity 7/15/03 Blended Coupon 5.7303% Excess Protection Level 3 Month Average 7.90% May, 2001 7.79% April, 2001 7.67% March, 2001 8.25% Cash Yield19.67% Investor Charge Offs 5.45% Base Rate 6.42% Over 30 Day Delinquency 4.84% Seller's Interest 8.52% Total Payment Rate14.20% Total Principal Balance$58,203,705,030.43 Investor Participation Amount$559,000,000.00 Seller Participation Amount$4,958,014,468.94