US STOCKS-Wall St drops as tech stocks sell off
* Apple, Facebook, Amazon, Alphabet all drop
* JPMorgan up after Q4 results beat
* GoPro sinks on weak holiday-sales forecast
* Indexes down: Dow 0.26 pct, S&P 0.33 pct, Nasdaq 0.83 pct (Updates to open)
By Ankur Banerjee
Jan 14 (Reuters) - U.S. stocks fell on Thursday morning, extending a selloff from the day before as investors remained worried about weak energy prices, U.S. corporate earnings and the global economy.
Heavyweights Apple, Amazon, Facebook and Alphabet were all down more than 1.5 percent, weighing heavily on the S&P and the Nasdaq.
JPMorgan rose 0.8 percent to $57.77 on better-than-expected results, but failed to boost the financial sector.
Oil prices steadied, but remained near 12-year lows as the prospect of Iran's oil hitting an oversupplied market loomed. Continuación...