Salomon BIG
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The Salomon Broad Investment Grade Index (known as the Salomon BIG or Citigroup BIG) is a common American Bond index, akin to the S&P 500 for stocks, originally owned by Salomon Brothers and now run by its successor, Citigroup. The BIG is generally used for managing broad debt portfolios from short to long-dated maturities, similar to the Lehman Aggregate or the Merrill Lynch Domestic Master.
The BIG includes Treasuries, Agency debt, Corporates, Non-Corporate Credit, Mortgage Backed Securities, and Asset Backed Securities (ABS). Unlike the Agg, it includes 144As, but unlike the Agg, it does not include Municipals or Commercial Mortgage Backed Securities (CMBS). Like the Agg, the BIG does not include any inflation linked bonds, and is limited to investment grade securities, including no High yield bonds or Emerging Market Debt.