Exhibit 99.30 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS December 31, 1997 Expected B Maturity 10/15/02 Blended Coupon 5.9065% Excess Protection Level 3 Month Average 4.16% December, 1997 4.16% November, 1997 N/A October, 1997 N/A Cash Yield 17.99% Investor Charge Offs 4.32% Base Rate 9.51% Over 35 Day Delinquency 4.81% Seller's Interest 16.15% Total Payment Rate 13.29% Total Principal Balance $34,934,847,924.76 Investor Participation Amount $750,000,000.00 Seller Participation Amount $5,643,513,406.27 * For purposes of calculating the Base Rate and Excess Protection Level, a Coupon of 7.51% (55/360) was used. The Base Rate was calculated using a 55 day monthly period, 11/06/97-12/31/97