Exhibit 99.51 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-K KEY PERFORMANCE FACTORS January 31, 2001 Expected B Maturity 10/17/2005 Blended Coupon 5.8733% Excess Protection Level 3 Month Average N/A January, 2001 7.15% December, 2000 0.00% November, 2000 N/A Cash Yield19.75% Investor Charge Offs 4.73% Base Rate 7.87% Over 30 Day Delinquency 4.88% Seller's Interest11.58% Total Payment Rate14.47% Total Principal Balance$57,905,967,832.59 Investor Participation Amount$750,000,000.00 Seller Participation Amount$6,705,277,271.10