* House vote scheduled for 1:30 p.m. ET
* Apple slips as Instinet raises iPhone X sales concerns
* Wal-Mart, Altria gain after positive broker comments
* Crypto bets hit by trading suspension for The Crypto Co
* Indexes down: S&P 0.22 pct, Nasdaq 0.52 pct, Dow 0.17 pct (Updates to early afternoon)
By Sruthi Shankar
Dec 19 (Reuters) - Wall Street dipped on Tuesday ahead of a vote on a bill to overhaul the U.S. tax system, with a pullback in technology stocks leading the declines after two strong session of gains on hopes that Congress will vote in favor of the bill.
The House of Representatives is set to vote in the afternoon, followed by the Senate later in evening. The Republican party is confident of the bill being signed into law by the end of the week.
The bill, among other things, proposes lowering corporate tax rates to 21 percent from 35 percent, which investors are betting will boost profits as well as trigger share buybacks and higher dividend payouts.
“Obviously there is high confidence that it will get passed, but there is a very narrow margin for error, within the Senate especially. So there’s a little bit of a pause to see what’s going to happen,” said Chris Zaccarelli, chief investment officer of Independent Advisor Alliance in Charlotte, North Carolina.
Apple fell 1.2 percent after broker Instinet downgraded the stock to “neutral,” saying the supply-demand balance for the iPhone X suggested little space to raise sales estimates for the next quarter.
The S&P 500 technology sector fell 0.74 percent, with tech stocks weighing the most on the major indexes.
At 12:35 a.m. ET (1735 GMT), the Dow Jones Industrial Average was down 41.31 points, or 0.17 percent, at 24,750.89 and the S&P 500 was down 5.93 points, or 0.22 percent, at 2,684.23.
The Nasdaq Composite was down 36.28 points, or 0.52 percent, at 6,958.48. On Monday, the index briefly topped 7,000-point mark for the first time on rising hopes of the tax bill being passed.
Six of the 11 major S&P sectors were lower, led by the tech sector. The gainers were led by the consumer staple index’s 0.54 percent rise.
Altria rose 2.24 percent after Berenberg upgraded the stock saying a lower tax rate would boost the tobacco company’s profit and shareholder payouts.
Wal-Mart rose 0.92 percent after Citigroup upgraded the stock to “buy” on expectations that the retailer’s shares will rise further in 2018.
Zimmer Biomet jumped 7 percent, the S&P’s biggest gainer, after the company appointed a full-time chief executive.
U.S. securities regulators temporarily suspended trading in the shares of The Crypto Co, up more than 2,700 percent this month on its cryptocurrency plans, on concerns about the “accuracy and adequacy” of its publicly-available information.
Shares of other small companies, which have surged on their own plans to cash in on the cryptocurrency craze, also dropped. First Bitcoin, USA Real Estate Holding, UBI Blockchain tumbled between 8 percent and 20 percent.
Declining issues outnumbered advancers on the NYSE by 1,856 to 999. On the Nasdaq, 1,712 issues fell and 1,146 advanced. (Reporting by Sruthi Shankar in Bengaluru; Editing by Savio D’Souza)