Exhibit 99.20 MBNA MASTER CREDIT CARD TRUST II SERIES 1996-K KEY PERFORMANCE FACTORS July 31, 1998 Expected B Maturity 11/17/03 Blended Coupon 5.8380% Excess Protection Level 3 Month Average 4.94% July, 1998 5.22% June, 1998 4.69% May, 1998 4.93% Cash Yield 18.75% Investor Charge Offs 5.14% Base Rate 8.39% Over 35 Day Delinquency 4.90% Seller's Interest 15.22% Total Payment Rate 14.52% Total Principal Balance $37,740,921,726.81 Investor Participation Amount $1,000,000,000.00 Seller Participation Amount $5,743,527,208.32