Shares of Six Flags Entertainment Corp. SIX and Cedar Fair Entertainment Co. FUN are rising following a report in the Wall Street Journal that the regional theme-park operators could announce a merger as soon as this week. Six’s stock is up 1.5% on Wednesday, while shares of Cedar Fair have climbed 5.6%. Cedar’s properties include Great America in Santa Clara, Calif., Kings Island in Cincinnati, and Canada’s Wonderland in Toronto.
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