While cash account equals street name, brokers are not allowed to lend your securities.
The only way a broker can lend your securities is if you have a margin debit or hav3e signed a hypothecation agreement, in whcih case the broker will be paying you interest.
From the SEC's website:
When you sell short, your brokerage firm loans you the stock. The stock you borrow comes from either the firm’s own inventory, the margin account of another of the firm’s clients, or another brokerage firm. As with buying stock on margin, you are subject to the margin rules. Other fees and changes may apply. If the stock you borrow pays a dividend, you must pay the dividend to the person or firm making the loan. (emphasis mine)
