US STOCKS-Wall St slides on lower crude prices, stock options expire
* For the week, S&P, Nasdaq on track to rise, Dow set for decline
* Boeing biggest drag on Dow; Apple weighs on S&P, Nasdaq
* Disney falls after rating cut
* Indexes down: Dow 1.4 pct, S&P 1 pct, Nasdaq 0.92 pct (Updates to late afternoon, changes byline)
By Marcus E. Howard
Dec 18 (Reuters) - U.S. stocks fell on Friday afternoon for the second day in a row, as crude oil prices headed for their third weekly loss and stock and index options contracts were set to expire.
All S&P sectors were down, led by financial stocks, which were down 1.8 percent.
The biggest drag on the financial index, Berkshire Hathaway , was down 2.4 percent, while Wells Fargo, and Citigroup were down more than 2 percent and JPMorgan was off 1.9 percent.
Wall Street remained anxious over an oil glut amid a demand slowdown. U.S. crude futures fell to their lowest level in nearly seven years at $34.29 a barrel. Brent crude was headed for its third week of losses, down almost 1 percent at $36.72. Continuación...