US STOCKS-Wall St flat, but tech and biotech lift Nasdaq
* Vertex soars on massive volume after clinical trial
* Micron rises after results, revenue outlook
* Consumer confidence at highest since Jan 2008
* Indexes up: Dow, S&P 500 0.1 pct, Nasdaq 0.5 pct (Updates to open, adds data)
By Ryan Vlastelica
NEW YORK, June 24 (Reuters) - U.S. stocks were little changed on Tuesday as some strong data wasn't enough to solidly lift indexes in the wake of a recent rally, though the Nasdaq index was boosted by gains in technology and biotech shares.
In the latest signs of improving economic conditions, consumer confidence surged more than expected in June, while May new home sales also rose more than had been anticipated. The housing data built on Monday's similarly bullish read on existing home sales, though a report on home prices was below forecasts.
The benchmark index was essentially flat on the day, but the S&P 500 managed to eke out another intraday record and was on track for its seventh advance over the past eight sessions.
"We remain bullish and are advising our clients to remain overweight on equities, but the levels of valuations and investor sentiment are starting to give us pause in the short term," said Bill Greiner, chief investment officer of Mariner Wealth Advisors in Leawood, Kansas. "We're not in nosebleed territory, but we are a bit stretched." Continuación...