Exhibit 99.30 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS February 28, 1998 Expected B Maturity 10/15/02 Blended Coupon 5.7473% Excess Protection Level 3 Month Average 4.59% February, 1998 4.74% January, 1998 4.87% December, 1997 4.16% Cash Yield 16.77% Investor Charge Offs 4.83% Base Rate 7.19% Over 35 Day Delinquency 5.04% Seller's Interest 15.07% Total Payment Rate 12.54% Total Principal Balance $34,488,564,555.67 Investor Participation Amount $750,000,000.00 Seller Participation Amount $5,197,230,037.18