Exhibit 99.50 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-E KEY PERFORMANCE FACTORS June 30, 2000 Expected B Maturity 05/17/2010 Blended Coupon 7.9030% Excess Protection Level 3 Month Average 1.40% June, 2000 1.40% May, 2000 N/A April, 2000 N/A Cash Yield18.78% Investor Charge Offs 4.56% Base Rate12.82% 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$590,000,000.00 Seller Participation Amount$6,607,972,797.02 For purposes of calculating the Base Rate and Excess Protection Level, a Coupon of 10.82% (30/360) was used. The Base Rate was calculated using a 30 day monthly period, 6/1/2000 to 6/30/2000.