Exhibit 99.27 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS February 29, 2000 Expected B Maturity 10/15/02 Blended Coupon 6.1799% Excess Protection Level 3 Month Average 5.44% February, 2000 6.10% January, 2000 5.20% December, 1999 5.02% Cash Yield 18.83% Investor Charge Offs 4.75% Base Rate 7.97% Over 30 Day Delinquency 5.01% Seller's Interest 9.54% Total Payment Rate 14.30% Total Principal Balance $48,263,301,515.80 Investor Participation Amount $750,000,000.00 Seller Participation Amount $4,604,500,997.31