Exhibit 99.48 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-B KEY PERFORMANCE FACTORS May 31, 2000 Expected B Maturity 2/18/03 Blended Coupon 6.6945% Excess Protection Level 3 Month Average 3.90% May, 2000 5.71% April, 2000 2.10% March, 2000 N/A Cash Yield19.29% Investor Charge Offs 4.66% Base Rate 8.92% Over 30 Day Delinquency 4.70% Seller's Interest 9.50% Total Payment Rate14.38% Total Principal Balance$52,496,626,963.52 Investor Participation Amount$750,000,000.00 Seller Participation Amount$4,987,826,445.03