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 3D-printing specialist Stratasys (Nasdaq: SSYS) were soaring into the fourth dimension today, as investors boosted shares as much as 17% after a bullish Wall Street upgrade.

So what: Interestingly, Dougherty analyst Andrea James lowered her target price on Stratasys from $32 to $28 but boosted her rating on the stock from "neutral" to "buy." James sees the stock as much more attractively valued after basically crashing over the past few months, particularly in light of its relationship with Hewlett-Packard (NYSE: HPQ), which has apparently been getting more bullish on the 3D printing market.

Now what: After trading at stratospheric levels earlier this year, Stratasys' stock is at a much more reasonable level now. That said, the stock is really cheap only if you buy into the future of 3-D printing -- a future that Motley Fool co-founder David Garner and fellow Fool Brian Stoffel think could have some serious legs. The bottom line on today's jump, though, is that while it can be good to consider the opinion of professional analysts, it's important to dig in and do your own research rather than chasing a stock simply because a Wall Streeter has given it the thumbs-up.

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