Analyst Upgrades

• Parker-Hannifin (PH) to buy from hold at Deutsche Bank.
• JDSU (JDSU) to buy from hold at Citigroup.
• Noble Corp. (NE) to overweight from neutral at JPMorgan.
• Cerner (CERN) to buy from hold at Auriga.
• Cintas (CTAS) to outperform from neutral at RW Baird.
• American States Water (AWR) to buy from hold at Brean Murray.
• National Semiconductor (NSM) and Texas Instruments (TXN) to positive from neutral at Susquehanna.
• Lululemon (LULU) to buy from hold at ThinkEquity.
• DuPont Fabros (DFT) to top pick from outperform at RBC Capital.

If you are looking for clues telling you which stocks have a good chance of increasing in value, you might want consider watching where insiders are putting their money. After all, talk is cheap, but when insiders put their own money on the line, you should sit up and take note.

Saul Centers Inc. (BFS) topped the insider-buying charts for the week ending June 18 as insiders snapped up 150,106 shares of company stock at a market value of $6,216,058. During the past six months, insiders have increased their overall holdings in the company by 10.1% and now own 31.7% of Saul Centers stock.

Biglari Holdings Inc. (BH) was not far behind, with insiders buying 15,083 shares at a market value of $4,721,937. Insiders now own 7.81% of the company's stock after increasing their overall holdings by 415.07% during the past six months.

DuPont Fabros is a mega operator of wholesale data centers.

When it talked to upstart Facebook, there was actually some skepticism. Would Facebook hit critical mass? Well, DuPont took a bet on the company – and it's certainly paid off.

In fact, DuPont has other top-notch customers, like Microsoft (NASDAQ: MSFT), Yahoo (NASDAQ: YHOO), and Google (NASDAQ: GOOG).

And, now DuPont has achieved another milestone; that is, the company went public today -- the ticker is "DFT". The company raised about $640 million.

DuPont focuses on long-term triple-net leases (which, of course, contain nice annual rental increases). A key differentiator is the focus on power capacity. Interestingly, part of the business model includes charging for power usage.

Although, there is signficant customer concentration. For example, about 86% of annualized rent comes from Microsoft and Yahoo.

So far today, shares of DuPont are up about 6.5% to $22.29.

Also visit DealProfiles.com if you want to check out other recent IPO activity.

Tom Taulli is the author of various books, including The Complete M&A Handbook and The Edgar Online Guide to Decoding Financial Statements.