Exhibit 99.30 MBNA MASTER CREDIT CARD TRUST II SERIES 1997-M KEY PERFORMANCE FACTORS March 31, 1998 Expected B Maturity 10/15/02 Blended Coupon 5.7520% Excess Protection Level 3 Month Average 5.19% March, 1998 5.96% February, 1998 4.74% January, 1998 4.87% Cash Yield 18.59% Investor Charge Offs 4.85% Base Rate 7.78% Over 35 Day Delinquency 5.06% Seller's Interest 11.41% Total Payment Rate 13.80% Total Principal Balance $33,909,306,783.29 Investor Participation Amount $750,000,000.00 Seller Participation Amount $3,867,972,264.80