The following is a list of stocks that have lagged the rest of the market over recent weeks, reporting losses over the last quarter.

In addition, all of these companies have seen insider buying over recent weeks.

Insiders remain optimistic, but the market isn't buying it. If you're a contrarian, this might raise a flag. Full details below.

Insider trading data sourced from Fidelity.

List sorted by net shares purchased by insiders.* 1. MannKind Corp. (NASDAQ:MNKD):* Biotechnology Industry. Market cap of $481.61M. Insiders purchased an average of 1,746,833 shares per year over the last two years. Short float at 25.13%, which implies a short ratio of 4.45 days. The stock has lost -61.9% over the last year.

*Communication Equipment Industry. Market cap of $583.78M. Insiders purchased an average of 1,048,656 shares per year over the last two years. Short float at 18.54%, which implies a short ratio of 22.96 days. The stock has gained 27.06% over the last year.*

**2. Iridium Communications Inc. (NASDAQ:IRDM):***Education & Training Services Industry. Market cap of $349.46M. Insiders purchased an average of 575,821 shares per year over the last two years. Short float at 2.39%, which implies a short ratio of 2.42 days. The stock has lost -7.14% over the last year.*

**3. ChinaCast Education Corporation (OTCPK:CAST):***Drug Manufacturer. Market cap of $322.37M. Insiders purchased an average of 493,694 shares per year over the last two years. Short float at 6.18%, which implies a short ratio of 5.85 days. The stock has lost -7.56% over the last year.*

4. Pharmacyclics Inc. (NASDAQ:PCYC):4. Pharmacyclics Inc. (NASDAQ:PCYC):

*Investment Brokerage Industry. Market cap of $667.92M. Insiders purchased an average of 280,630 shares per year over the last two years. Short float at 3.84%, which implies a short ratio of 3.76 days. The stock has lost -7.21% over the last year.*

**5. Interactive Brokers Group, Inc. (NASDAQ:IBKR):***Medical Instruments & Supplies Industry. Market cap of $433.71M. Insiders purchased an average of 127,600 shares per year over the last two years. Short float at 20.35%, which implies a short ratio of 15.11 days. The stock has lost -4.21% over the last year.*

**6. China Medical Technologies Inc. (CMED):***Apparel Stores Industry. Market cap of $401.84M. Insiders purchased an average of 125,250 shares per year over the last two years. Short float at 4%, which implies a short ratio of 5.09 days. The stock has lost -39.79% over the last year.*

**7. Charming Shoppes Inc. (NASDAQ:CHRS):***Regional Bank. Market cap of $367.43M. Insiders purchased an average of 81,907 shares per year over the last two years. Short float at 11.07%, which implies a short ratio of 66.33 days. The stock has gained 25.95% over the last year.*

8. Towne Bank (NASDAQ:TOWN):8. Towne Bank (NASDAQ:TOWN):

*Paper & Paper Products Industry. Market cap of $401.96M. Insiders purchased an average of 74,701 shares per year over the last two years. Short float at 3.39%, which implies a short ratio of 5.82 days. The stock has lost -8.58% over the last year.*

**9. Wausau Paper Corp. (NYSE:WPP):***Home Furnishings & Fixtures Industry. Market cap of $370.83M. Insiders purchased an average of 50,000 shares per year over the last two years. Short float at 15.22%, which implies a short ratio of 12.73 days. The stock has gained 7.71% over the last year.*

**10. Deer Consumer Products, Inc. (OTC:DEER):***Healthcare Information Services Industry. Market cap of $338.04M. Insiders purchased an average of 23,528 shares per year over the last two years. Short float at 2.51%, which implies a short ratio of 6.22 days. The stock has gained 100% over the last year.*

**11. MedQuist Inc. (PINK:MEDQ.PK):***Oil & Gas Drilling & Exploration Industry. Market cap of $494.29M. Insiders purchased an average of 23,250 shares per year over the last two years. Short float at 19.29%, which implies a short ratio of 11.8 days. The stock has lost -21.94% over the last year.*

12. Rex Energy Corporation (NASDAQ:REXX):12. Rex Energy Corporation (NASDAQ:REXX):

*Cleaning Products Industry. Market cap of $376.08M. Insiders purchased an average of 20,500 shares per year over the last two years. Short float at 2.69%, which implies a short ratio of 7.42 days. The stock has lost -22.64% over the last year.*

13. Zep, Inc. (NYSE:ZEP):13. Zep, Inc. (NYSE:ZEP):

*: Property & Casualty Insurance Industry. Market cap of $399.41M. Insiders purchased an average of 19,612 shares per year over the last two years. Short float at 0.09%, which implies a short ratio of 65.92 days. The stock has lost -4.52% over the last year.*

**14. Donegal Group Inc. (NASDAQ:DGICA)***Water Utilities Industry. Market cap of $449.97M. Insiders purchased an average of 14,263 shares per year over the last two years. Short float at 2.97%, which implies a short ratio of 11.93 days. The stock has gained 10.62% over the last year.*

**15. SJW Corp. (NYSE:SJW):***Data Storage Devices Industry. Market cap of $637.88M. Insiders purchased an average of 13,234 shares per year over the last two years. Short float at 6.78%, which implies a short ratio of 3.48 days. The stock has gained 10.12% over the last year.*

16. Quantum Corp. (NYSE:QTM):16. Quantum Corp. (NYSE:QTM):

*: Apparel Stores Industry. Market cap of $359.93M. Insiders purchased an average of 12,363 shares per year over the last two years. Short float at 1.99%, which implies a short ratio of 2.6 days. The stock has lost -3.04% over the last year.*

**17. Stein Mart Inc. (NASDAQ:SMRT)****Disclosure:**I have no positions in any stocks mentioned, and no plans to initiate any positions within the next 72 hours.