Its no secret that speculators wide and far are betting the common and preferred shares of Fannie Mae and Freddie Mac could rise significantly as their profits continue to stay robust. But according to James Lockhart, who once headed the Federal Housing Finance Agency, these speculators are likely throwing their money away. Speaking at a recent housing forum sponsored by the Bipartisan Policy Center, he noted that the Treasury Department owns the senior preferred of the GSEs and the senior stock sits above the junior shares. Lockhart said the government preferred will never be paid back, which means the junior holders are out of luck. Lockhart, who now serves as vice chairman of WL Ross & Co., said he does not own any stock in the two nor does he plan on buying any.