Exhibit 99.27 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-E KEY PERFORMANCE FACTORS March 31, 2001 Expected B Maturity 4/15/08 Blended Coupon 5.8936% Excess Protection Level 3 Month Average 7.37% March, 2001 7.63% February, 2001 7.35% January, 2001 7.13% Cash Yield20.71% Investor Charge Offs 4.83% Base Rate 8.25% Over 30 Day Delinquency 4.90% Seller's Interest 7.37% Total Payment Rate14.60% Total Principal Balance$56,622,749,044.91 Investor Participation Amount$882,400,000.00 Seller Participation Amount$4,172,058,483.42