It is an arbitrage. Most holders of JKAOB are JKA holders also. Those with the heads are selling at 17 to take up the options at 15. It's a no-brainer arbitrage trade if your holding both. Reduces your entry price from 15 cents to 13 cents.
What is comforting is the price is holding up which means accumulation and as Askier put it this does not look like a small cap pump and dump blow off.
Once the options close on October 31 we will get an updated to 20 so it will be interesting to see who has been accumulating. The off screen buying supports the story being revalued. This has the potential to move into the 40's in the short term on the back of more good news.
JKA Price at posting:
16.1¢ Sentiment: Buy Disclosure: Held