Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Once again, shares of Star Scientific (Nasdaq: CIGX) fell more than 10% on no news whatsoever. Welcome back to the wide world of speculative microcaps.

So what: A broad market meltdown appears to be to blame for Star's suffering this time. For long-term investors, it's an opportunity to get in at … 28 times book value and 566 tomes sales. Ouch.

Now what: Bullish investors will rightly counter that Star's CigRX dietary supplements are no different from any in-development drug and that the potential payoff for reducing or eliminating cigarette cravings could be in the billions. In that sense, today's selloff could be a non-event. Do you agree? Disagree? Weigh in using the comments box below.

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