Exhibit 99.18 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-K KEY PERFORMANCE FACTORS November 30, 1999 Expected B Maturity 11/17/03 Blended Coupon 5.5817% Excess Protection Level 3 Month Average 5.95% November, 1999 5.83% October, 1999 6.19% September, 1999 5.84% Cash Yield 18.33% Investor Charge Offs 4.89% Base Rate 7.61% Over 30 Day Delinquency 5.02% Seller's Interest 8.52% Total Payment Rate 14.09% Total Principal Balance $48,461,894,441.68 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $4,130,074,923.19