At The Motley Fool, we poke plenty of fun at Wall Street analysts and their endless cycle of upgrades, downgrades, and "initiating coverage at neutral." So you might think we'd be the last people to give virtual ink to such "news." And we would be -- if that were all we were doing.

But in "This Just In," we don't simply tell you what the analysts said. We'll also show you whether they know what they're talking about. To help, we've enlisted Motley Fool CAPS, our tool for rating stocks and analysts alike. With CAPS, we'll be tracking the long-term performance of Wall Street's best and brightest -- and worst and sorriest, too.

And speaking of the best ...
As a general rule, when deciding on a company to profile in any given day's edition of this column, I look for high-profile stocks. Today, I'm going to go in the exact opposite direction, because it's not the big names that UBS initiated coverage on today that got my attention. I've got nothing against LDK Solar (NYSE:LDK) or Suntech Power (NYSE:STP) -- to the contrary, I like the latter company so much that I interviewed the CEO just a couple months back (read the transcript here). It's just that, sunpowered though they might all be, neither one holds a candle to a name like Yingli Green Energy (NYSE:YGE). How can you not write about a name like that?

So here's the deal. On Friday, CAPS standout UBS up and initiated coverage on all three of the companies named above, giving each one its very own "buy" rating. Granted, two of the three companies named (LDK being the exception) are in freefall today, but does that mean UBS was wrong to endorse them?

Let's go to the tape
For a clue to the answer, we turn to CAPS and a glance at UBS's record as a stock picker. What we find there is that the firm boasts an admirable CAPS rating of 94.56, and a record of making correct calls on its stocks about 53% of the time. A couple of these winners being energy-related firms, they're especially relevant to today's solar power picks:

Company

UBS Said:

CAPS Says:

UBS's Pick Beating S&P by:

Potash of Saskatchewan (NYSE:POT)

Outperform

*****

53 points

Schlumberger (NYSE:SLB)

Outperform

*****

52 points

Meanwhile, UBS' worst calls seem to be grouped more in the volatile retail sector:

Company

UBS Said:

CAPS Says:

UBS's Pick Lagging S&P by:

Circuit City (NYSE:CC)

Outperform

*

69 points

Coldwater Creek (NASDAQ:CWTR)

Outperform

***

58 points

So at first glance, UBS seems to have a decent handle on the energy industry. But the Associated Press report on its upgrade doesn't give us a lot of (read: "any") detail on just why it is that UBS likes YGE. Anyone want to take a guess?

[Raises hand]
Me, me! I do! Although before today, I admit I'd never heard of the company (in my own defense, it only went public three months ago), I have to say I like what I see on the Yahoo! Finance page for Yingli. In addition to having a name that just plain brings a smile to the face, the company's valuation also aims to please. Currently valued at a nosebleed-inducing 83 times trailing earnings, analysts predict that, over the next year, Yingli will earn enough profits to slice the "8" off of that valuation, bringing the stock down to a "forward P/E" of just 3.2.

Does that sound too good to be true? It sure does to me, and I can't help but notice that the firm's not currently generating -- nor has it ever generated -- a penny in free cash flow. That said, regardless of the veracity of the Yingli story, its P/E alone looks certain to attract buyers. Combine that mouthwatering earnings yield with the endorsement of a star stock picker like UBS, and I see bright days ahead for this stock.

Two opinions not enough for you? Looking for a third? Then don't forget to check out our CAPS page on Yingli, and see what the current score leader on the stock has to say about its prospects. Just don't be surprised when you learn that the player with the best record on Yingli is no professional analyst at all, but an ordinary individual investor like you and me.

Fool contributor Rich Smith owns no shares of any company mentioned above. You can find him on CAPS, publicly pontificating under the handle TMFDitty, where he's currently ranked No. 358 out of more than 60,000 players. Suntech Power is a Rule Breakers selection. The Fool has a disclosure policy.