Exhibit 99.45 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-J KEY PERFORMANCE FACTORS October 31, 1999 Expected B Maturity 09/15/2009 Blended Coupon 7.0938% Excess Protection Level 3 Month Average 3.97% October, 1999 3.97% September, 1999 N/A August, 1999 N/A Cash Yield18.43% Investor Charge Offs 4.16% Base Rate10.30% Over 30 Day Delinquency 5.07% Seller's Interest 9.14% Total Payment Rate14.64% Total Principal Balance$47,636,626,081.62 Investor Participation Amount$1,000,000,000.00 Seller Participation Amount$4,354,806,563.13 For the purposes of calculating Base Rate and Excess Protection Level, a Coupon of 8.30% (38/360) was used. The Base Rate was calculated using a 38 day monthly period, 9/23/99 - 10/31/99.