Texas Workers Compensation Self-Insurance Group (SIG) 5% Investments are investments made by the Texas Workers Compensation Self-Insurance Group (SIG) to fund the self-insurance program. These investments are used to cover the costs of claims arising from workplace accidents and illnesses, and provide a financial cushion in the event of a large, unexpected claim. There are three main types of Texas Workers Compensation Self-Insurance Group (SIG) 5% Investments: fixed income investments, equity investments, and alternative investment strategies. Fixed income investments include U.S. government and agency bonds, certificates of deposits (CDs), and money market accounts. Equity investments include stocks and mutual funds. Alternative investment strategies include hedge funds, private equity funds, real estate, and commodities.