In the investment services complex, insiders are snapping up shares in Och-Ziff Capital Management Group ( OZM), an institutional alternative asset manager. Insiders are buying this stock into weakness since shares are off by over 40% in 2011. Och-Ziff Capital Management Group has a market cap of $852.90 million and an enterprise value of $1.41 billion. This stock trades at a cheap valuation; its forward price-to-earnings is just 6.41. This company's estimated growth rate for this year is -48.7%, and for next year it's pegged at 127.6%. This is far from a cash-rich company, with a total cash position on its balance sheet of $170.87 million and total debt of $721.08 million. The CEO just bought 273,799 shares, or about $2.9 million worth of stock, at $7.86 to $7.87 per share. A director also just bought 104,756 shares, or $827,664 worth of stock, at $7.86 to $7.93 per share. From a technical standpoint, OZM is currently trading below both its 50-day and 200-day moving average, which is bearish. This stock just plunged from its October high of $11.32 down to a recent low of $7.32a share. Since hitting that low, the stock has rebounded and is now flirting with some near-term overhead resistance at $8.50 a share. One could be a buyer of OCM once it sustains a higher volume move and close above $8.50 and then $9.01 (its 50-day) on high-volume. Look for volume that's tracking in close to or above its three-month average action of 1,582,580 shares. If we get that action soon, then look for OCM to trend back towards $10.50 to $11.97 (its 200-day) a share. Use a mental stop just under $8.50 if you get long off strength or weakness. To see more stocks with notable insider buying, including Memorial Production Partners ( MEMP), Seacor ( CKH) and Laredo Petroleum ( LPI), check out the Stocks With Big Insider Buying portfolio on Stockpickr. -- Written by Roberto Pedone in Winderemere, Fla.