http://www.dailykos.com/stories/2016/1/14/1469670/-Ted-Cruz-s-loan-from-Goldman-Sachs-was-a-bullish-bet-on-the-Obama-economy
"the Goldman loan was a so-called “margin loan,” which was secured by Cruz’s brokerage account. Usually, notes reporter Mike McIntire, margin loans are used to purchase stocks, but they don’t have to be, and so Cruz used the proceeds to support his campaign."