Special nonmarketable certificates, notes, and bonds offered to state and local governments as a means to invest proceeds from their own tax-exempt financing. Interest rates and maturities comply with IRS arbitrage provisions. Slugs are offered in both time deposit and demand deposit forms. Time deposit certificates have maturities of up to one year. Notes mature in one to ten years and bonds mature in more than ten years. Demand deposit securities are one-day certificates rolled over with a rate adjustment daily.