NEW YORK (Standard&Poor's) Nov. 7, 2013--U.S. independent power producer Calpine Corp. (B+/Stable/--) has announced a $1 billion multi-year share buyback program. The proposed program doesn't affect the rating at this time. We think that Calpine will fund the program essentially with operating cash flow or liquidity but not by issuing debt. We also think that Calpine will generally maintain its current liquidity position, which we consider as "adequate", while undertaking share repurchases.