Answer:
demand for loanable funds will decrease
Explanation:
Loanable funds is the total of all funds that people have saved and deposited in the savings account of commercial banks. This saved funds are in turn lended out to borrowers so as to gain returns (interest) on it.
When a private investor becomes less optimistic, they would not want to invest their money in loan able funds, therefore the demand for loan able funds will decrease which leads to reduction in the real interest rate.