Over-the-counter shares of Fannie Mae, Freddie Mac jump after report Trump aiming for IPO of mortgage giants

** Over-the-counter shares of Fannie Mae FNMA.PK and Freddie Mac FMCC.PK jump after a Wall Street Journal report that Trump administration is preparing to sell stock in mortgage giants later this year

** FNMA jumps 19.7% to $9.90, while FMCC up 19% at $7.89

** Plans under discussion could value the companies at roughly $500 billion or more combined, and fetch $30 billion - Wall Street Journal report

** Fannie Mae and Freddie Mac have been under federal conservatorship since 2008, following the financial crisis during which both entities became insolvent amid the subprime mortgage meltdown

** The companies did not immediately respond to Reuters' requests for comment