Exhibit 99.29 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-A KEY PERFORMANCE FACTORS December 31, 1999 Expected B Maturity 3/17/03 Blended Coupon 6.6168% Excess Protection Level 3 Month Average 5.57% December, 1999 4.65% November, 1999 5.86% October, 1999 6.21% Cash Yield19.14% Investor Charge Offs 5.04% Base Rate 9.45% Over 30 Day Delinquency 4.63% Seller's Interest11.35% Total Payment Rate14.35% Total Principal Balance$49,947,826,881.37 Investor Participation Amount$750,000,000.00 Seller Participation Amount$5,671,007,362.88