CVR Energy's decision not to pursue the spin-off of its nitrogen fertilizer business, which is indirectly owned through its interests in CVR Partners, LP, may impact its stock price in the short term. The decision was made after a thorough review by the board, considering current market conditions and the best interests of CVR Energy and its stockholders. This decision may lead to a neutral short-term impact on the stock price, as investors may have mixed reactions to the news.