I'm quite sure that they have third party market makers.
A few weeks ago the market maker's bot for the daily contract had some serious malfunctions and I was able to ramp up 1 BTC to 22 BTC at expiry. It was quite a grave concern for them. I could have withdrawn, but wangxinxi acted as an intermediary and asked if I could give the marketmaker another chance. 22 BTC was quite a lot for that marketmaker and coinut doesn't have that much volume at the time. So he said the marketmaker was offering a bounty. I made a counter offer and asked for a bit more. And well the market maker agreed.
Well, it seems like he decided to leave now. Coinut has different market makers on the 30 minute and the vanilla options. Actually I believed the weekly, and biweeklies was using a different market maker also. They offer incentives to the market makers for providing liquidity but if the market makers don't feel like it they can stop market making. Now Coinut is going to need to find some new market makers.
Maybe, I should have been betting less and work on bringing in new users first. Now it's going to be hard with a market maker MIA.
Or it could be that the market maker had some sort of trigger that shut down their system. Maybe the markets are just too volatile right now for them to make markets currently.
It seems quite problematic to simply apply black-scholes to bitcoin, given the wild swings in volatility. Bitcoin was built for volatility. You might say it was built to break black-scholes. Market maker has to be either very seasoned, or very deep pockets to make this work. Coinut is NEITHER seasoned NOR deep pockets. They are PHd students getting carried away with their thesis ... lol. I'm hoping this works ... but I'm not overwhelmed by the odds.
Btw, nice score Chris. Apparently you were paying closer attention than me ... Do you mean to say you gave some of your profits back to the market maker?!?
Yeah I returned the a big chunk of the profits. 20 BTC would've been nice. It was right when they released the volume indicators. The marketmaker would switch from buying put options at 0.00875 to selling put options deep in the money for cheap or something like that. And then it would switch back so that you can sell some back to raise my capital so I could do more each time.
Anyways the marketmaker wasn't too happy about that. And well they were going to leave so I gave some back, since I really wanted the platform to grow. But it looks like they left anyways.
As for black scholes, I think 30 minute pricing makes sense. Even the cheap options, if you keep buying them during a flat market, bitcoin can actually stay flat. And they lose money that one time there's volatility but then the pricing will change.
Also I was wondering about weeklies and biweeklies. They're actually quite expensive for out of the money options. I think you should be able to hedge it especially if you sell binary options on a wide range of strikes.
Btcoracle uses some sort of trading engine to do their odds.
I also think if you're marketmaking you should dynamically price based on demand, to help hedge your position. Also if everyone's buying call options you make them more expensive. That helps reduce exposure.