Exhibit 99.31 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-E KEY PERFORMANCE FACTORS June 30, 2000 Expected B Maturity 4/15/08 Blended Coupon 6.4532% Excess Protection Level 3 Month Average 5.58% June, 2000 5.40% May, 2000 6.01% April, 2000 5.32% Cash Yield18.81% Investor Charge Offs 4.56% Base Rate 8.85% 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$882,400,000.00 Seller Participation Amount$6,607,972,797.02