The situation is made all the worrisome because the hole is believed to be close to a well containing 1.5 million barrels of liquid butane, a highly volatile liquid that turns into a highly flammable vapor upon release.

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That includes pushing ahead with the next phase of NYSE's "hybrid" trading model, which pushes more trading in the most liquid stocks to an automated system and leaves the trading of more illiquid or highly volatile stocks in the hands of the specialists on the floor.

FORBES: NYSE Looks For Options