Exhibit 99.37 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-A KEY PERFORMANCE FACTORS January 31, 2000 Expected B Maturity 2/17/04 Blended Coupon 5.9932% Excess Protection Level 3 Month Average 5.28% January, 2000 5.38% December, 1999 4.66% November, 1999 5.80% Cash Yield17.74% Investor Charge Offs 4.73% Base Rate 7.63% Over 30 Day Delinquency 5.03% Seller's Interest 9.78% Total Payment Rate14.21% Total Principal Balance$49,077,414,912.07 Investor Participation Amount$500,000,000.00 Seller Participation Amount$4,800,914,393.58