SIX

If you haven't had enough of roller coasters after the ups and downs of the stock market this month, you might consider adding an amusement-park operator to your portfolio. Between Six Flags and Cedar Fair, which stock has the potential to deliver the smoothest ride for investors?

Six Flags Inc. (SIX) announced yesterday that , barring a significant restructuring, it is likely to go bankrupt this summer. Although this news came out after the close of the market, shares dropped 10 percent to 18 cents in electronic trading. This follows a 32 percent drop this year. In mid-day...