US STOCKS-Wall Street resumes 2016 slide as energy stocks tumble
* Oil-price drop drags on equities
* Tyco jumps after deal to merge with Johnson Controls
* Caterpillar falls after Goldman slaps with "sell" rating
* Twitter down, 4 top executives to leave co
* Indexes down: Dow 1.29 pct, S&P 1.56 pct, Nasdaq 1.58 pct (Updates to with close of U.S. markets)
By Lewis Krauskopf
Jan 25 (Reuters) - Wall Street sold off on Monday, pulled lower by further weakness in oil prices as energy shares led declines, with major indexes retreating after last week's strong gains.
Oil prices fell 6 percent on concerns of oversupply after news that Iraq's output reached a record last month.
The S&P energy group dropped 4.5 percent, the worst performing sector. Exxon and Chevron each fell more than 3 percent, while ConocoPhillips tumbled 9.2 percent after Barclays said the company should cut its dividend by at least 75 percent. Continuación...