Exhibit 99.44 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-J KEY PERFORMANCE FACTORS March 31, 2000 Expected B Maturity 09/15/2009 Blended Coupon 7.0937% Excess Protection Level 3 Month Average 5.56% March, 2000 5.72% February, 2000 5.88% January, 2000 5.09% Cash Yield19.39% Investor Charge Offs 4.70% Base Rate 8.98% Over 30 Day Delinquency 4.65% Seller's Interest 8.73% Total Payment Rate15.20% Total Principal Balance$49,480,326,758.32 Investor Participation Amount$1,000,000,000.00 Seller Participation Amount$4,321,526,239.83