That could be the explanation, but the merger may have resulted in a new analyst covering IDIX for the merged firm. When I see the Stifel Nicolaus report on IDIX, this will be clear; in the meantime, if anyone here has the report, please speak up!
Confirmed that the Stifel Nicolaus analyst covering IDIX is Stephen Willey, the same analyst who covered IDIX for Thomas Weisel prior to the merger. Thus, Stifel’s “initiation” of IDIX coverage on July 14 was a non-event, just as you surmised. Regards, Dew