> There's a large arbitrage opportunity right now. Futures are going for about $1,000 more than BTC itself right now and you can make risk-free* (assuming you know how to securely store your private key) profit. Doing so requires selling a future.
Not really. You have to post margin against your short position, which is costly and could rapidly lead to a margin call where you are forced to close your short position at the worst possible time (futures price surges, you are closed out in the futures but still long the cash Bitcoin, and then the spot price crashes before you can sell your cash position). Furthermore, there is a non-trivial cost of carry - properly securing your Bitcoin private key involves a costly cyber security infrastructure and operation. Then there is the massive counter party credit risk that you take on when facing the cash Bitcoin exchange (eg Mt. Gox). Finally, there are the unknown unknowns ... this is the first week of trading for a brand new type of futures contract created on the back of a bleeding edge technology bubble, things could go wrong in all kinds of unforeseen ways. So I would submit that a $1000 cash vs. futures spread is in fact not some huge arbitrage opportunity (or, in other words, there is no free lunch here in front of this steamroller).
Not really. You have to post margin against your short position, which is costly and could rapidly lead to a margin call where you are forced to close your short position at the worst possible time (futures price surges, you are closed out in the futures but still long the cash Bitcoin, and then the spot price crashes before you can sell your cash position). Furthermore, there is a non-trivial cost of carry - properly securing your Bitcoin private key involves a costly cyber security infrastructure and operation. Then there is the massive counter party credit risk that you take on when facing the cash Bitcoin exchange (eg Mt. Gox). Finally, there are the unknown unknowns ... this is the first week of trading for a brand new type of futures contract created on the back of a bleeding edge technology bubble, things could go wrong in all kinds of unforeseen ways. So I would submit that a $1000 cash vs. futures spread is in fact not some huge arbitrage opportunity (or, in other words, there is no free lunch here in front of this steamroller).