___NTSB: Boeing 787 battery shows short-circuiting WASHINGTON (AP) â¿¿ The Boeing 787 Dreamliner battery that caught fire earlier this month in Boston shows evidence of short-circuiting and a chemical reaction known as "thermal runaway," in which an increase in temperature causes progressively hotter temperatures, federal accident investigators said Thursday. It's not clear to investigators which came first, the short-circuiting or the thermal runaway, National Transportation Safety Board Chairman Deborah Hersman said. Nor is it clear yet what caused either of them, she said during a news briefing on the board's investigation. The fire took place aboard a Japan Airlines 787 shortly after it landed at Boston's Logan International Airport on Jan. 7. All the passengers had left the aircraft, but a cleaning crew noticed smoke in the cabin 26 minutes after the plane arrived at its gate. It took firefighters nearly 40 minutes to put out a battery fire in the rear auxiliary power unit. ___ Netflix stocks soars 41 percent after strong 4Q report SAN FRANCISCO (AP) â¿¿ Netflix's rollercoaster ride on Wall Street surged to new heights Thursday. The company's stock climbed $43.60 to close at $146.86 as investors celebrated a fourth-quarter earnings report highlighted by accelerated growth in Netflix's Internet video service. The 42 percent increase in Netflix's market value marked the stock's biggest single-day gain since it went public more than a decade ago when investors were still shunning Internet businesses in the wake of the dot-com bust. ___ By The Associated Press(equals) The Dow Jones industrial average gained 46 points to close at 13,825.33. The Nasdaq fell 23.29 points to 3,130.38. The Standard & Poor's 500 index edged up 0.01 of a point to 1,494.82. Benchmark oil gained 72 cents to finish at $95.95 a barrel on the New York Mercantile Exchange. Brent crude, used to price international varieties of oil, rose 48 cents to end at $113.28 per barrel on the ICE Futures exchange in London.