[molticrystal]

Here is an idea of how much you'll need invested into a rarer stock or your typical retail brokerage account:

Fidelity: "*You must have at least $250,000 in your Fidelity brokerage account(s) to apply."

Schwab depends on the stock, but it seems many people get an email when they have over $100k of an eligible, especially rarer, security.

TDAmeritrade does not offer it, but they were bought out by Schwab so that will likely change as your account is transferred over.

"Interactive Brokers earns 15% annualized income from lending shares with a value of $10,000 and it posts $10,000 cash collateral to a participant's account"