That is a good question (rare for this board!). I think it is really quite low right now. There can not be more than 5m shares available - unless Kovner and his former hedge fund are lending shares out to shorts for yield, which is highly probable until they decide to run the squeeze. The yield is pretty good on lending, so why not, especially if calling them back in boosts the value of your stake. Even so, let's assume they lend out 20% of their stake and assume that other institutional holders are doing the same. There can not be more than 10m shares available on the market.