Exhibit 99.38 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-E KEY PERFORMANCE FACTORS July 31, 2000 Expected B Maturity 6/17/02 Blended Coupon 6.8090% Excess Protection Level 3 Month Average 5.56% July, 2000 6.07% June, 2000 4.90% May, 2000 5.70% Cash Yield19.22% Investor Charge Offs 4.57% Base Rate 8.58% Over 30 Day Delinquency 4.81% Seller's Interest11.87% Total Payment Rate14.13% Total Principal Balance$55,010,319,976.67 Investor Participation Amount$1,000,000,000.00 Seller Participation Amount$6,529,119,458.18