The state pension fund posted a second quarter rate of return of 4 percent, boosting the state’s pension fund to $150.1 billion, State Comptroller Tom DiNapoli announced this morning.

The second quarter ended Sept. 30.

DiNapoli warned, however, that the ongoing uncertainty of the fiscal cliff negotiations in Washington could lead to severe damage on the economy in New York and across the country.

“The New York State Common Retirement Fund produced reasonable gains this quarter amid a slow economy and uncertainty in the market about the elections,” DiNapoli said. “As one of the largest institutional investors in the world, we urge the President and Congress to resolve the massive economic decisions they face and avoid a standoff on the fiscal cliff issue that could damage our economy. While the diversification of our assets will help the Fund weather economic storms, a swift compromise in Washington could help 2013 be a more prosperous year for investors like us.”