I purchased a fair number of TSLA when they IPO'd, for a bit lower than the actual IPO price of $17. A little over a year ago, my brokerage offered to borrow my shares at 4% annual interest (paid on a monthly basis). I was told that I would retain the ability to trade the stock at any time, but I gave up my shareholder voting rights while the stock was "loaned" out.

I had never heard of that happening to small individual investors like me, and at that time I looked into it and learned that this was typically done because there was a lot of interest in short sales for the stock and there wasn't enough borrowable stock to cover demands.

I renew the loan agreement on a monthly basis and in March 2013 I was offered an increase from 4% to 6% interest for the loan of my shares, indicating that short-sellers were very eager to get their hands on TSLA stock.

I'm curious to see if today's activities cause my June offer to drop my interest rate or if the offer just expires altogether. I would guess that at minimum I'll see a lower interest rate.