Exhibit 99.30 MBNA MASTER CREDIT CARD TRUST II SERIES 1999-A KEY PERFORMANCE FACTORS May 31, 2001 Expected B Maturity 2/17/04 Blended Coupon 4.4588% Excess Protection Level 3 Month Average 7.73% May, 2001 7.62% April, 2001 7.51% March, 2001 8.08% Cash Yield19.67% Investor Charge Offs 5.45% Base Rate 6.59% Over 30 Day Delinquency 4.84% Seller's Interest 8.52% Total Payment Rate14.20% Total Principal Balance$58,203,705,030.43 Investor Participation Amount$500,000,000.00 Seller Participation Amount$4,958,014,468.94