Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- Fannie Mae and Freddie Mac were created to help individuals realize the American dream of home ownership, but they now find their survival at risk in the U.S. mortgage crisis. Steps to shore up FannieMae and Freddie Mac could eventually stabilize home prices. Friday's closure of California-based IndyMac bank by federal regulators on Friday sparked investor panic that sent shares of mortgage finance giants Fannie Mae and Freddie Mac on a wild ride and fueled speculation of a government rescue. On Sunday, the Treasury Department and Federal Reserve announced steps to make funds available to Fannie Mae and Freddie Mac if necessary.Fannie Mae, Freddie Mac own or guarantee almost half of U.S. home loansGovernment announces steps to shore up mortgage giants if necessarySteps could stabilize home prices 
 Question:The nickname comes from the acronym _, which stands for Federal National Mortgage Association.

Fannie Mae