US STOCKS-Wall St moves higher after erratic early trading
* Apple hits record high in erratic trading
* Merck on track for its best day since January 2014
* Feb U.S. single-family home prices rise
* Indexes up: Dow 0.4 pct, S&P 0.3 pct, Nasdaq 0.2 pct (Updates to early afternoon, changes comment)
By Tanya Agrawal
April 28 (Reuters) - U.S. stocks held on to their gains in early afternoon trading on Tuesday, reversing earlier declines, on strong earnings from Merck, better-than-expected housing data and a dividend hike from IBM.
The markets swung between gains and losses in early trading, led by Apple. Apple hit a record high early after its strong results. The shares then fell as much as 2.3 percent, weighing on all three major indices, before recovering to trade up 0.1 percent at $132.85
A majority of the ten S&P 500 sectors were up in afternoon trading, led by a 1.4 percent rise in the teleservices index .
U.S. single-family home prices rose more than expected in February from a year earlier, according to a survey. Continuación...