By Ryan Vlastelica
NEW YORK (Reuters) - U.S. stock index futures pointed to a higher open on Tuesday as a pair of big M&A deals boosted market optimism and pointed to a rebound from the broad decline in the previous session, which was the S&P 500's weakest day in a month.
Energy shares will be in focus as crude oil continued its recent volatility. U.S. crude futures
Declines in energy shares have corresponded with the weakness in oil, which is down more than 30 percent from a recent high. The S&P 500 energy index <.SPNY> is the weakest industry group by far this year, and the only one to be negative for 2014.
In the latest deal news, Cypress Semiconductor Corp
Separately, Otsuka Pharmaceutical Co Ltd said it would buy Avanir Pharmaceuticals Inc
Cypress rose 13 percent to $11.75 in premarket trading while Spansion was up 18 percent at $26.90. Avanir added 13.5 percent to $17.03.
Apple Inc
Investors are looking ahead to a reading of October construction spending, due at 10 a.m. (1500 GMT) and seen rising by 0.6 percent. Markets may be vulnerable to a weak reading, which would follow tepid reports on manufacturing on Monday and could prompt traders to take profits.
Despite Monday's decline, equities have been strong of late and continue to hover near record levels. Major indexes closed out a sixth straight week of gains last week.
(Editing by Chizu Nomiyama and Nick Zieminski)