The G fund: portfolio effects of a dominant asset

Lee S. Redding

Journal of Pension Economics and Finance, 2009, vol. 8, issue 2, 225-238

Abstract: The Thrift Savings Plan (TSP) is the defined contribution pension plan for the employees of the US Federal Government. It is also mentioned as a model to implement private investment accounts as part of US Social Security reform. The TSP has one unique investment opportunity – the Government Securities Investment Fund. This ‘G Fund’ is a short-term asset which pays long-term rates. This provides an implicit subsidy to federal employees. To collect this subsidy, however, employees must alter their portfolios. The subsidy may therefore be an inefficient means of compensating federal employees. Within a social security system, however, the G Fund would present the opportunity to partially ‘opt out’ of a private investment account.

Date: 2009
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