Momenta Pharmaceuticals, Inc. (MNTA)

[semi_infinite]

Depends on what you are looking at. If you are looking at stock only, then not much seems to be anticipated. But look at the options, they are very active and the open interest represents 1+ million shares on the long side and another 100k+already added today. If this continues, then we will approach 20000+ call contracts soon, some of which would be hedging against short positions. Bottom line is that option players expect volatility spike before expiration, although option prices hasn't moved..