CA is passively managed to hold a broad portfolio of USD-denominated investment grade debt issued by the state of California and its agencies. Interest income must be exempt from federal income tax and the alternative minimum tax (AMT). Eligible securities must have at least $25 million outstanding face value and at least one-month remaining term to maturity. The index excludes tobacco sector bonds, floating and variable rate notes, secondarily insured securities, custodial receipts, muni commercial paper, private placements, 144A securities, Municipal Liquidity Facility bonds, and securities in legal default. The resulting portfolio is market value-weighted, subject to a 25% single issuer cap. The index rebalances on a monthly basis.