Exhibit 99.23 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS January 31, 2001 Expected B Maturity 10/15/02 Blended Coupon 5.8432% Excess Protection Level 3 Month Average 4.62% January, 2001 7.13% December, 2000 0.36% November, 2000 6.38% Cash Yield 19.75% Investor Charge Offs 4.73% Base Rate 7.89% Over 30 Day Delinquency 4.88% Seller's Interest 11.58% Total Payment Rate 14.47% Total Principal Balance $57,905,967,832.59 Investor Participation Amount $750,000,000.00 Seller Participation Amount $6,705,277,271.10