Exhibit 99.50 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-L KEY PERFORMANCE FACTORS June 30, 2001 Expected B Maturity 11/15/2007 Blended Coupon 6.2352% Excess Protection Level 3 Month Average 7.39% June, 2001 6.96% May, 2001 7.69% April, 2001 7.52% Cash Yield18.98% Investor Charge Offs 5.67% Base Rate 6.35% Over 30 Day Delinquency 4.78% Seller's Interest 8.00% Total Payment Rate14.15% Total Principal Balance$57,876,901,808.74 Investor Participation Amount$500,000,000.00 Seller Participation Amount$4,631,211,247.25