While Fools should generally take the opinion of Wall Street with a grain of salt, it's not a bad idea to take a closer look at particularly stock-shaking upgrades and downgrades -- just in case their reasoning behind the call makes sense.

What: Shares of Magna International (NYSE:MGA) climbed about 2% this morning after Goldman Sachs upgraded the Canadian auto parts supplier from sell to neutral.

So what: Along with the upgrade, analyst Patrick Archambault boosted his price target to $101 (from $78), representing about 8% worth of upside to yesterday's close. While value investors might be turned off by Magna's share-price surge over the past year, Archambault thinks that there might be room left to run given the strong operating tailwinds continuing to work in its favor.

Now what: According to Goldman, Magna's risk ot reward trade-off is now pretty balanced. "Our rationale for the Sell rating in April 2012 was that MGA was trading at a premium to other cyclical suppliers (e.g., TEN, TRW, LEA) despite a slower growth outlook and execution concerns in the European interiors/exteriors business," Archambault noted. "Over the course of this time both revenue and EBIT growth rates have been stronger than expected on content wins and better execution." Of course, with Magna shares now up a whopping 75% over the past year and trading largely in line with the sector, I'd wait for a wider margin of safety before making too big of a commitment. 

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.