There is no guarantee that all eligible shares in a given account will be loaned through the Stock Yield Enhancement Program as there may not be a market at an advantageous rate for certain securities, IBKR may not have access to a market with willing borrowers or IBKR may not want to loan your shares.
Will IBKR lend out all eligible shares?
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Why are my shares not being lent, even though I am enrolled in the Stock Yield Enhancement Program (SYEP)?
Will IBKR lend out all eligible shares?
Is the Stock Yield Enhancement program available to IBKR Lite accounts with IBKR Singapore?
How is the income received by a client on any given Stock Yield Enhancement Program loan transaction determined?