Exhibit 99.50 MBNA MASTER CREDIT CARD TRUST II SERIES 2000-F KEY PERFORMANCE FACTORS July 31, 2000 Expected B Maturity 6/15/2005 Blended Coupon 6.9517% Excess Protection Level 3 Month Average 2.60% July, 2000 2.60% June, 2000 N/A May, 2000 N/A Cash Yield18.75% Investor Charge Offs 4.45% Base Rate11.70% Over 30 Day Delinquency 4.81% Seller's Interest11.87% Total Payment Rate14.13% Total Principal Balance$55,010,319,976.67 Investor Participation Amount$882,400,000.00 Seller Participation Amount$6,529,119,458.18 For purposes of calculating the Base Rate and Excess Protection Level, a Coupon of 9.70% (38/360) was used. The Base Rate was calculated using a 38 day monthly period, 6/23/00 to 7/31/00.