Exhibit 99.39 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-B KEY PERFORMANCE FACTORS November 30, 1999 Expected B Maturity 3/16/09 Blended Coupon 5.9788% Excess Protection Level 3 Month Average 5.89% November, 1999 5.79% October, 1999 6.11% September, 1999 5.76% Cash Yield18.33% Investor Charge Offs 4.89% Base Rate 7.65% Over 30 Day Delinquency 5.02% Seller's Interest 8.52% Total Payment Rate14.09% Total Principal Balance$48,461,894,441.68 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,130,074,923.19