IB isn't for sale, now or ever...period. And don't confuse a low stock price, which is basically a popularity contest, with the cash stream generated by ongoing operations and the current ~2+% dividend. Regarding his retirement, TP said something like "why would I ever sell something I love and know so well and believe in so much for anything else?" And he definitely isn't going to sell it at $15 per share when they didn't sell a follow-on offering at $32 per share the year after they went public.