Exhibit 99.12 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-A KEY PERFORMANCE FACTORS February 28, 1999 Expected B Maturity 3/17/03 Blended Coupon 5.1736% Excess Protection Level 3 Month Average 5.82% February, 1999 6.04% January, 1999 5.67% December, 1998 5.77% Cash Yield 17.82% Investor Charge Offs 5.13% Base Rate 6.66% Over 35 Day Delinquency 5.38% Seller's Interest 9.80% Total Payment Rate 13.67% Total Principal Balance $40,800,539,305.60 Investor Participation Amount $700,000,000.00 Seller Participation Amount $3,998,619,787.11