Exhibit 99.42 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-I KEY PERFORMANCE FACTORS June 30, 2000 Expected B Maturity 08/15/2002 Blended Coupon 6.4825% Excess Protection Level 3 Month Average 5.35% June, 2000 4.97% May, 2000 5.72% April, 2000 5.35% Cash Yield18.75% Investor Charge Offs 4.56% Base Rate 9.22% Over 30 Day Delinquency 4.60% Seller's Interest12.05% Total Payment Rate14.03% Total Principal Balance$54,839,173,315.51 Investor Participation Amount$750,000,000.00 Seller Participation Amount$6,607,972,797.02