Exhibit 99.1 MBNA MASTER CREDIT CARD TRUST II Series 2001-D MBNA CREDIT CARD MASTER NOTE TRUST KEY PERFORMANCE FACTORS JUNE 30, 2001 MBNA Series Performance JUNE 2001 Excess Protection Level 6.03% Portfolio Yield 12.39% Investor Charge-Offs 7.05% Base Rate 6.36% Delinquency 30 to 59 days 1.73% 60 to 89 days 1.03% 90 + days 0.74% Total Payment Rate 14.15% Investor Principal Amount Class A $1,000,000,000. 00 Class B $250,000,000.00 Class C $250,000,000.00 Total $1,500,000,000. 00