Data about the credit default swaps market is available from three main sources. Data on an annual and semiannual basis is available from the International Swaps and Derivatives Association (ISDA) since 2001 and from the Bank for International Settlements (BIS) since 2004. The Depository Trust & Clearing Corporation (DTCC), through its global repository Trade Information Warehouse (TIW), provides weekly data but publicly available information goes back only one year. The numbers provided by each source do not always match because each provider uses different sampling methods. Daily, intraday and real time data is available from S&P Capital IQ through their acquisition of Credit Market Analysis in 2012.