(1)F0>S0ert
Borrow S0 to buy a unit of asset, enter into a forward contract to short the asset for F0 in time T;
(2)F0<S0ert
Short sale S0 and invest in a bank, enter into a forward contract to buy the asset for F0 in time T
请老师详细解释一下这两句话的意思,尤其是asset是S0对应的资产吗?当F0<S0ert,应该是卖出S0,为什么在习题中的解答是借入USD?