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 Micron Technology (NASDAQ:MU) climbed 1% today after Citigroup boosted its price target on the stock.

So what: Analyst Glen Yeung maintained his hold rating on Micron, but the new price target of $30 (from $19) represents a whopping 62% worth of upside to Friday's close. While value investors might be turned off by the stock's red-hot run over the past year, Yeung thinks that the strong likelihood of higher prices for Micron's DRAM products gives it plenty of more room to run.

Now what: Yeung doesn't expect Micron's rivals to fight for market share as intensely as they did before. "The DRAM industry has heightened potential for a sustained period of profitability, atypical of the industry's past," Yeung noted. Of course, with Micron shares up a whopping 265% over its 52-week lows and trading at a clear price-to-sales premium to the industry, it's hard to believe that those bullish expectations aren't already baked in.

Fool contributor Brian Pacampara has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.