VXEM is especially interesting for volatility traders at the moment.
The problem isn't limited to one or two brokers, and this isn't an issue of competing pricing models; the false quotes are caused by vendors assuming, falsely, that the asset underlying VIX option quotes is the "spot" VIX index.
One reason traders buy and sell option straddles is to express views about the future volatility of the underlying.
The commodity traders I know tend, as a group, to at least be cognizant of prevailing seasonality when structuring trades, even if their pricing models don't make explicit allowances for it.
Valuing futures on stocks, commodities and currencies.
Assuming there aren't any new snags on Wednesday, traders can position for a return to some normalcy by selling the December contract.
Paying attention to boring aspects of derivatives contract specifications can make all the difference between your looking like a demagogue, and not.
This trade would stand to profit if the front of the yield curve declines, as traders would make a greater profit on the March futures than they would lose on the December contract.
Realized vol, correlation, implied vol, and term structure -- are probably the most meaningful signals of what's happening in the market.
Here are three things you should know before trading a spread between two futures contracts in the same market