Final answer:
U.S. Treasury Securities are one kind of collateral given to secure a securities loan.
Step-by-step explanation:
One kind of collateral given to secure a securities loan is U.S. Treasury Securities. These are bonds issued by the U.S. government, which are considered low-risk because the government is virtually certain to pay off the bond. Banks often use U.S. Treasury Securities as collateral because they are confident in the government's ability to repay.