Interest Sensitive Stock
  
See: Interest Rate Sensitivity.
Think: highly leveraged companies, i.e. those with debt that's more than 6 times their cash flow.
And note that many companies borrowed dough when their cash flow was, say, $100 million and they borrowed $300 million...but then their cash flow was cut in half for whatever reason, so they went from only 3x debt-to-EBITDA to 6x, and probably getting worse.
Don't let this happen to you.