Exhibit 99.12 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-K KEY PERFORMANCE FACTORS May 31, 2001 Expected B Maturity 11/17/03 Blended Coupon 4.3045% Excess Protection Level 3 Month Average 7.83% May, 2001 7.76% April, 2001 7.58% March, 2001 8.15% Cash Yield 19.67% Investor Charge Offs 5.45% Base Rate 6.45% Over 30 Day Delinquency 4.84% Seller's Interest 8.52% Total Payment Rate 14.20% Total Principal Balance $58,203,705,030.43 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $4,958,014,468.94