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." Today, we'll show you whether those bigwigs actually know what they're talking about. To help, we've enlisted Motley Fool CAPS to track the long-term performance of Wall Street's best and worst.

Pump and dump
Well, folks, it's been a little over three weeks since Elon Musk IPO'ed SolarCity (SCTY.DL), the second of his three businesses designed to redesign the world. And you know what that means: The underwriters who foisted this unprofitable pump 'n dump had their gag orders lifted yesterday, and out came the recommendations:

  • Bank of America -- buy 
  • Roth Capital -- buy 
  • Goldman Sachs -- buy 
  • Needham & Co. -- buy 
  • Credit Suisse -- buy!

Okay. Technically, that last one was an "outperform." But you get the gist -- Wall Street is hooting, hollering, and pounding the table with both wingtips, urging investors to buy this stock. But why?

Estimates of how much SolarCity shares could be worth a year from now range from a modest $17 estimate at Needham, all the way up to Bank of America's $21 target. Of course, the shares already cost more than $16 a pop. So it's hard to see why Needham, for example, is so hot and bothered over a potential profit of... 5%.

Or is it?

Underwriters rejoice!
Call me a cynic, but I can't help but think it's more than a coincidence that every single one of the analysts who told us to buy SolarCity yesterday... also underwrote the company's stock offering last month. Of the five, Goldman Sachs has the most obvious conflict of interest, inasmuch as the 4.8 million shares it underwrote in the SolarCity IPO put its reputation at most risk if the stock decides to tank.

But Credit Suisse's risk is not insubstantial, either. CS underwrote 3.6 million shares in the December offering. B of A took on 2.5 million shares. Needham and Roth, 287,500 each. And, of course, there was a 1.7 million overallotment option on the table as well...

There could be more than just reputations at risk here, too. As a general rule, when a banker agrees to underwrite a stock offering, failure to sell the shares can result in the banker having to buy the stock itself. (Remember Facebook?) In short, if SolarCity doesn't do well, these bankers could take a financial, as well as a reputational, hit.

What could possibly go wrong?
Granted, there are reasons for being optimistic about SolarCity's chances -- and the bankers' chances of being right about it hitting $17, $18, or even $21 a share. For one thing, last week SolarCity issued new guidance suggesting its pace of solar panel installations is rising strongly, and could be up 60% in 2013, over 2012 levels. For context, the 250 million megawatts SolarCity plans to install this year are nearly as much as the 290 million megawatt Agua Caliente solar project that First Solar (FSLR -2.09%) recently sold to Berkshire Hathaway. And according to Goldman, SolarCity could keep up the growth for many years to come, averaging 30%-35% compounded growth through 2016.

In short, it may have only just IPO'ed, but SolarCity is already a major player in this market.

For another thing, the supply glut of solar panels on the market continues unabated. That may be bad news for unprofitable solar manufacturers like Trina Solar (NYSE: TSL) and SunPower (SPWR -2.17%) But it's very good news indeed for SolarCity, which gets to buy cheap panels, then install them on customers' rooftops and collect a nice, steady revenue stream from them -- fatter and fatter profits, the more panel prices plunge.

What could go wrong
But let's not get ahead of ourselves. Remember: SolarCity's rapid growth owes largely to the deal it's offering consumers. Needham described to StreetInsider.com how it works: "SolarCity [offers] solar leases at lower rates than retail electricity." On the one hand, this can't-lose proposition has helped SolarCity to "rapidly [grow] to become the largest player in the retail solar market." On the other hand, it's hard to see how SolarCity could fail to become popular, offering consumers such a can't-lose proposition.

So far, however, it's been a must-lose proposition for SolarCity itself, which has paired rapid revenue growth with mounting GAAP losses on its income statement.

Foolish final thought
Elon Musk owns three companies right now: SolarCity, electric buggy maker Tesla Motors (TSLA -3.55%), and private space launch pioneer SpaceX. Only one of those companies (SpaceX) is currently profitable. But it's the unprofitable companies, the ones burning cash and losing money -- Tesla and SolarCity -- that Musk has foisted upon the markets. While permitting unsuspecting individual investors to shoulder the losses at Tesla and SolarCity, Musk is keeping profitable SpaceX for himself.

Gee, I wonder why?

I also wonder why investors would willingly take advice from conflicted bankers, and pile into shares of SolarCity at a time when it's reporting GAAP losses at the rate of $47 million a year, and burning through cash at the rate of $315 million a year. That doesn't sound like smart investing to me.

But then again, I didn't underwrite the IPO.