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: Shares of DealerTrack Holdings (NASDAQ:TRAK.DL), a provider of web-based software to the automotive industry, shed as much as 12% before rebounding to be down just 3% as of this writing, following its third-quarter earnings results.

So what: For the quarter, DealerTrack recorded a 3% increase in revenue, to $99.1 million, and an adjusted profit of $0.28. Both results fell slightly shy of the Wall Street consensus, which called for $99.5 million in sales and a profit of $0.30. What appears to be making up for the shortfall is the company's updated full-year guidance, which was slightly boosted from its own previous forecasts to a revenue range of $387 million to $390 million, and EPS of $1.08-$1.12, which (using the midpoint of EPS) are both slightly higher than current Street expectations.

Now what: DealerTrack has provided investors with a nice balance of organic growth and growth by acquisition, acquiring ClickMotive to broaden its digital retailing potential, and Ford's (NYSE:F) Canadian iConnect direct marketing solutions division. The only concern I have is whether we've given the company too frothy a valuation -- 20 times forward earnings -- given that global consumer spending is weak and auto sales have slowed since mid-year. For now, this is one I'd rather watch from the sidelines.

Will Ford pick up the slack and help companies like DealerTrack heading into 2013, or will weakened consumer spending put a kibosh on near-term growth? Find out the answer to this question and much more by getting your copy of our latest premium research report on Ford. Packed with in-depth analysis on the opportunities and threats facing Ford -- and complete with a year of regular updates -- this report will give you the tools needed to make smart long-term investing decisions.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.