The strategist behind Energy Future Holdings’ coal plant buildout said Thursday that it doesn’t make sense to build any power plants right now.

Jonathan Siegler, chief financial officer for Bluescape Resources, said the cost to build any type of new power generation — coal, nuclear, solar, wind or natural gas — is higher than the current price of power.

“The signals are that it’s not time to build,” Siegler said at a conference organized by the University of Texas’ Energy Management and Innovation Center. Siegler was the top strategist for TXU Corp. before it was purchased by private investors and became Energy Future Holdings.