The International Swaps and Derivatives Association (ISDA) has published a research note examining five years of global credit default swap (CDS) market activity from 2021–25, reporting that activity reached a record USD 41.8 trillion in 2025, surpassing the previous peak of USD 38.7 trillion in 2022. Index CDS drove the increase, accounting for 93.3% of total activity at USD 39.0 trillion, while single-name CDS activity stood at USD 2.8 trillion. The index-to-single-name ratio fell sharply to 8.5x in 2023 amid banking sector stress before recovering to 13.8x in 2025. Single-name CDS peaked at USD 3.3 trillion in 2023 following the failures of Silicon Valley Bank and other lenders. Index and single-name CDS responded differently to market events. During the 2020 coronavirus (COVID-19) pandemic and the 2025 US tariff shock, index CDS rose more sharply than single-name activity. CDX.NA.IG and iTraxx Europe together accounted for approximately 75% of index CDS activity in 2025, at 43.4% and 32.4% respectively. Market breadth remained stable, with 710–760 unique reference entities executed each quarter. Central clearing covered 78.1% of index CDS notional and 63.1% of single-name CDS notional in 2025. In H1 of 2026, total CDS trading reached USD 27.4 trillion, up 27.8% year-on-year, with index CDS rising 28.3% to USD 25.7 trillion and single-name CDS growing 19.8% to USD 1.7 trillion.