I created a prediction market to test creation, and settling.  It is asset BTCPREDICT.  I originally set it as an over under on the price of bitcoin at $450.  Bitcoin then decided to drop $90 and rebound $30.  As no bets have been matched, I have changed the over under price to $380.  I will almost certainly just end up selling some to myself before I settle the asset, but I wanted to be clear about the changes to the asset in case anyone does decide to buy in.