American Express Says USCS Card Member Loans 30 Days Past Due Loans As A % Of Total 1.4% At Feb 2026 End; USCS Card Member Loans Net Write-Off Rate-Principal Only 2.0% At Feb 2026 End; U.S. Small Business Card Member Loans 30 Days Past Due Loans As A % Of Total 1.7% At Feb 2026 End; U.S. Small Business Card Member Loans Net Write-Off Rate-Principal Only 2.8% At Feb 2026 End