The group's share rose 6p to 135p on the news.
Central shares rose 80p to £13.45 on the news, but most others fell.
Investors applauded, and the stock rose more than 8 percent on the news.
Prices rose slightly on the news of the possible reduction.
The company's shares rose on the news, closing at $38.125, up $1.625.
Shares of Alfa rose nearly 9 percent on the news.
Most rose rapidly on the news, only to collapse later.
Shares of Williams and other natural gas companies rose on the news.
The stock rose more than 8 percent on the news.
The stock rose on the news, but then returned to its previous, lower level.