Exhibit 99.24 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-J KEY PERFORMANCE FACTORS June 30, 2000 Expected B Maturity 9/15/04 Blended Coupon 6.8224% Excess Protection Level 3 Month Average 5.38% June, 2000 4.95% May, 2000 5.68% April, 2000 5.50% Cash Yield 18.75% Investor Charge Offs 4.56% Base Rate 9.24% Over 30 Day Delinquency 4.60% Seller's Interest 12.05% Total Payment Rate 14.03% Total Principal Balance $54,839,173,315.51 Investor Participation Amount $750,000,000.00 Seller Participation Amount $6,607,972,797.02