Actions speak louder than words, as the old saying goes. So why do the media focus so much attention on what Wall Street says about companies instead of what it does with them?

Once upon a time, we didn't know what the bankers were up to. Now, thanks to the folks at finviz.com, it's easy to keep tabs on the stocks that financial institutions buy and sell. And the 170,000-plus lay and professional investors on Motley Fool CAPS can lend us further insight into whether these decisions make sense.

Here's the latest edition of Wall Street's Buy List, alongside our investors' opinions of the companies involved:

Companies

Recent Price

CAPS Rating (out of 5)

Hatteras Financial (NYSE: HTS) $28.82 *****
Frontier Communications (Nasdaq: FTR) $3.50 ***
AIG (NYSE: AIG) $28.99 **
Threshold Pharmaceuticals (Nasdaq: THLD) $6.80 **
LinkedIn (Nasdaq: LNKD) $98.52 *

Companies are selected based on past-3-month changes in institutional ownership, as reported on finviz.com. Recent price provided by Yahoo! Finance. CAPS ratings from Motley Fool CAPS.

Up on Wall Street, the professionals think these stocks are the greatest things since sliced bread. But are they really the best places for you to put your money?

Not all Fools are convinced. For example, LinkedIn -- the closest thing to Facebook that folks could invest in before the FB IPO (and how great did that one work out, huh?) gets only a single, solitary star on CAPS. Granted, at a share price of 675 times trailing earnings, investors probably couldn't afford giving this one a second star. And now that Facebook is out there itself, and selling for just a fraction of LinkedIn's P/E, investors have to wonder whether there's still as much reason to own LinkedIn at all.

Speaking of pricey stocks, Threshold Pharma certainly fits the bill. It has no profits. No free cash flow, either. Threshold does have an experimental cancer-fighter TH-302 in development that's gaining momentum as it moves through clinical trials. Investors are betting that these numbers will start looking better if TH-302 gets FDA approval. Until then, though, the stock remains speculative.

Moving on to Frontier, we finally begin to approach reasonable-seeming valuations, and Frontier pays a hefty 11.4% dividend yield to boot. Besides the declining landline industry, the real issue with Frontier, as I've mentioned before, is its debt -- nearly $8 billion net of cash on hand, towering more than twice as high as the stock's own market cap, and interest payments eat up more than half of the company's operating earnings.

Two-star-rated AIG is actually my favorite stock on the list, sporting a price-to-book ratio of 0.50, a forward P/E ratio eight, and long-term earnings growth estimates of 11% per year. Nevertheless, CAPS investors still see another stock as more attractive -- and I'll defer to the majority. Fools have rated Hatteras Financial the top stock on Wall Street's Buy List today -- rated five stars, no less -- so that's the one we'll focus on. 

Without further ado...

The bull case for Hatteras Financial
Why do Fools love Hatteras? JaxxBrat calls it "a strong REIT in a strong sector and it pays high yield" -- 12.5%, which is even better than the payout at Frontier.

CAPS member chuckshipley sees every likelihood that Hatteras will be able to keep churning debt into mortgage-backed securities gold, and paying out the profits in dividend form, because after all, "we've been promised 2 more years of low interest rates."

And as CAPS All-Star cjlee001 reasons, so long as "there's free money ... thanks to the fed," Hatteras should be able to make a profit off of borrowing it, and investing it in mortgages.

Are these Fools right? So far, they are. Hatteras' quarterly dividend recently declined slightly due to a declining interest rate spread, but it's still quite high. If it can keep this up, then today's P/B ratio of just 1.06 is a fair price to pay for investors attracted by Hatteras' strong dividend yield.

Yet even so, I can't help feeling just a tiny bit nervous about the idea of investing in a company that's leveraged 7 to 1. There are just so many ways this could all blow up -- a drop in long-term interest rates, which reduces Hatteras' income, an eventual hike in short-term interest rates, which raises the cost of borrowing for Hatteras.

Personally, I'm more comfortable investing in stocks that offer lower, but more rock-solid dividend yields of the traditional variety, than investing in REITs like Hatteras -- but that's just me. It's a big, wide market out there, and values abound for investors of many strategies. Is Hatteras the kind of stock you want to own?

Click over to Motley Fool CAPS now, and tell us why.