Exhibit 99.48 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-B KEY PERFORMANCE FACTORS April 30, 2000 Expected B Maturity 2/18/03 Blended Coupon 6.3015% Excess Protection Level 3 Month Average 2.10% April, 2000 2.10% March, 2000 N/A February, 2000 N/A Cash Yield18.56% Investor Charge Offs 5.29% Base Rate11.17% Over 30 Day Delinquency 4.72% Seller's Interest10.74% Total Payment Rate13.82% Total Principal Balance$52,271,464,953.72 Investor Participation Amount$750,000,000.00 Seller Participation Amount$5,612,664,435.23 For the purpose of calculating Base Rate and Excess Protection level, a Coupon of 9.17% (33/360) was used. The Base Rate was calculated using a 33 day monthly period, 3/28/00 - 4/30/00.