Here is a list of 42 stocks that have lost at least a fifth of their value in the past month (market cap at least $300M). A cursory glance shows a lot of tech stocks, which would make sense considering the NASDAQ's under performance of late.
| Ticker | Company | Return | Mkt Cap |
| FNSR | Finisar Corp. | -47.5% | 1,824 |
| BKS | Barnes & Noble, Inc. | -45.4% | 609 |
| CEDC | Central European Distribution Corp. | -44.1% | 854 |
| HSFT | hiSoft Technology International Ltd. | -37.9% | 576 |
| DAKT | Daktronics Inc. | -34.6% | 433 |
| NTRI | NutriSystem Inc. | -32.8% | 355 |
| RCKBD | Rockville Financial, Inc. | -32.6% | 311 |
| CCSC | Country Style Cooking Restaurant | -32.5% | 405 |
| CIS | Camelot Information Systems Inc. | -31.5% | 673 |
| FN | Fabrinet | -29.8% | 713 |
| RLOC | ReachLocal, Inc. | -28.6% | 487 |
| AMLN | Amylin Pharmaceuticals, Inc. | -28.3% | 1,593 |
| ATML | Atmel Corporation | -27.2% | 5,359 |
| MDAS | MedAssets, Inc. | -27.2% | 872 |
| NTSP | NetSpend Holdings, Inc. | -26.4% | 948 |
| OCLR | Oclaro, Inc. | -26.2% | 609 |
| JDSU | JDS Uniphase Corporation | -25.0% | 4,734 |
| NVDA | NVIDIA Corporation | -24.8% | 10,260 |
| MMI | Motorola Mobility Holdings, Inc | -24.7% | 6,904 |
| MOTR | Motricity, Inc. | -24.5% | 555 |
| REE | Rare Element Resources Ltd. | -24.2% | 449 |
| IDCC | InterDigital, Inc. | -24.2% | 1,904 |
| OPLK | Oplink Communications Inc. | -23.5% | 412 |
| OMX | OfficeMax Inc. | -23.4% | 1,107 |
| NTAP | NetApp, Inc. | -23.2% | 17,113 |
| STEC | STEC, Inc. | -23.1% | 936 |
| CISG | Cninsure Inc. | -23.1% | 700 |
| CCJ | Cameco Corp. | -23.0% | 12,845 |
| UIS | Unisys Corporation | -22.9% | 1,315 |
| NAK | Northern Dynasty Minerals Ltd. | -22.7% | 1,327 |
| TNS | TNS Inc. | -22.3% | 393 |
| HOLI | Hollysys Automation Technologies, Ltd | -21.9% | 709 |
| SPRD | Spreadtrum Communications Inc. | -21.6% | 886 |
| PBY | Pep Boys - Manny, Moe & Jack | -21.5% | 595 |
| LOPE | Grand Canyon Education, Inc. | -21.4% | 684 |
| CQP | Cheniere Energy Partners LP. | -21.4% | 2,823 |
| TNDM | Neutral Tandem, Inc. | -21.3% | 466 |
| GTY | Getty Realty Corp. | -21.2% | 677 |
| MRVL | Marvell Technology Group Ltd. | -21.1% | 10,141 |
| MIPS | MIPS Technologies Inc. | -20.8% | 588 |
| CY | Cypress Semiconductor Corporation | -20.5% | 3,252 |
| HGG | hhgregg, Inc. | -20.5% | 544 |
