With respect to securities lending, it is used to temporarily obtain the guarantee for other purposes, for example. B for short position hedging or for use in complex financial structures. Securities are generally borrowed for a royalty, and securities borrowing transactions are subject to other types of legal agreements than deposits. In a pension agreement, a trader sells securities to a counterparty with the agreement to buy them back at a higher price at a later date. The trader takes short-term measures at a favourable interest rate with a low risk of loss. The transaction is concluded with a reverse-repo. That is, the counterparty resold them as agreed to the trader. When state-owned central banks buy back securities from private banks, they do so at an updated interest rate, called a pension rate. Like policy rates, pension rates are set by central banks. The repo-rate system allows governments to control the money supply within economies by increasing or decreasing available resources. A reduction in pension rates encourages banks to resell securities for cash to the state.
This increases the money supply available to the general economy. Conversely, by raising pension rates, central banks can effectively reduce the money supply by discouraging banks from reselling these securities. While conventional repositories are generally credit risk termination instruments, there are residual credit risks. Although this is essentially a guaranteed transaction, the seller may not buy back the securities sold on the due date. In other words, the pension seller does not fulfill his obligation. Therefore, the buyer can keep the warranty and liquidate the guarantee to recover the borrowed money. However, security may have lost value since the beginning of the operation, as security is subject to market movements. To reduce this risk, deposits are often over-insured and subject to a daily market margin (i.e., if the guarantee ends in value, a margin call may be triggered to ask the borrower to reserve additional securities). Conversely, if the value of the guarantee increases, there is a credit risk to the borrower, since the lender is not allowed to resell it. If this is considered a risk, the borrower can negotiate a subsecured repot.  The short answer is yes – but there are significant differences of opinion on the extent of this factor.
Banks and their lobbyists tend to characterize regulation as a bigger cause of problems than policy makers who put in place the new rules after the 2007-9 global financial crisis. The objective of the rules was to ensure that banks had sufficient capital and liquidity, which can be sold quickly in the event of difficulties. These rules may have allowed banks to keep reserves rather than lend them to the repo market in exchange for treasury bills. Beginning in late 2008, the Fed and other regulators adopted new rules to address these and other concerns. One consequence of these rules was to increase pressure on banks to maintain their safest assets, such as Treasuries. They are encouraged not to borrow them through boarding agreements. According to Bloomberg, the impact of the regulation was significant: at the end of 2008, the estimated value of the world securities borrowed was nearly $4 trillion. But since then, that number has been close to $2 trillion. In addition, the Fed has increasingly entered into pension (or self-repurchase) agreements to compensate for temporary fluctuations in bank reserves.