The Dow and S&P 500 ended at record highs on Friday and other indexes posted strong gains for a second week after the Bank of Japan's surprise move to ramp up its stimulus program.

U.S. stocks edged higher on Wednesday boosted by gains in the energy sector, with traders looking forward to a statement from the U.S. Federal Reserve as it winds down its stimulus program.

U.S. stocks ended near flat on Monday, pausing after the S&P 500's biggest weekly gain since January 2013, while energy shares fell with another decline in oil prices.

U.S. stock index futures fell on Friday, putting the S&P 500 on track to trim its weekly advance, following disappointing earnings from Amazon and as the first diagnosed case of Ebola in New York City raised concerns about the spread of the virus.

U.S. stocks erased earlier gains to close lower on Wednesday as a shooting at the Canadian parliament unnerved investors, Boeing and Biogen sold off following results, and energy stocks fell along with oil prices.

Broadcom (BRCM.O) posted third-quarter results on Tuesday that exceeded Wall Street's expectations as the chipmaker focused on networking and smartphone chips, sending its shares 5 percent higher.

Netflix Inc signed up fewer video streaming subscribers than forecast for the quarter that ended in September as its U.S. growth slowed markedly, sending its shares plunging as much as 27 percent.

JPMorgan Chase & Co (JPM.N) reported a third-quarter profit as the biggest U.S. bank boosted revenue from trading and investment banking, and moved past the huge legal claims that pushed it into a rare loss in the same quarter last year.

Struggling Sears Holdings Corp (SHLD.O) said it would raise up to $380 million by selling most of its stake in Sears Canada Inc (SCC.TO) through a rights issue, generating much-needed cash ahead of the crucial holiday shopping season.

U.S. stocks ended flat in a volatile session on Thursday as energy stocks rebounded and investors bought beaten-down shares, especially small caps.