It's time to take stock of the bears' dirty dozen in the faltering subprime sector, Jim Cramer said Wednesday on CNBC's Stop Trading! segment.

Cramer said that with this week's meltdown of New Century ( NEWC) -- the Irvine, Calif.-based lender to homebuyers with poor credit histories -- short-sellers and others are targeting 12 players in the subprime market.

Cramer said some of the companies are doomed and others are being unfairly lumped in, but he stressed that investors must know who is in the shorts' targets before buying or selling any of these names.

These are the companies:

  1. IndyMac (NDE)
  2. CharterMac (CHC)
  3. Friedman Billings (FBR)
  4. Fremont General (FMT)
  5. Redwood Trust (RWT)
  6. Newcastle Investment (NCT)
  7. American Home Mortgage (AHM)
  8. Gramercy (GKK)
  9. RAIT (RAS)
  10. Accredited (LEND)
  11. Thornburg Mortgage (TMA)
  12. CapitalSource (CSE)
At the time of publication, Cramer had no position in stocks mentioned.

Jim Cramer is a director and co-founder of TheStreet.com. He contributes daily market commentary for TheStreet.com's sites and serves as an adviser to the company's CEO. Outside contributing columnists for TheStreet.com and RealMoney.com, including Cramer, may, from time to time, write about stocks in which they have a position. In such cases, appropriate disclosure is made. To see his personal portfolio and find out what trades Cramer will make before he makes them, sign up for Action Alerts PLUS. Watch Cramer on "Mad Money" weeknights on CNBC. Click here to order Cramer's latest book, "Mad Money: Watch TV, Get Rich," click here to order his book, "Real Money: Sane Investing in an Insane World," click here to get his second book, "You Got Screwed!" and click here to order Cramer's autobiography, "Confessions of a Street Addict." While he cannot provide personalized investment advice or recommendations, he invites you to send comments on his column by clicking here.

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