US STOCKS-Apple boosts Nasdaq and Dow, S&P little changed
* Fed's John Williams sees 2-3 rate hikes in 2016
* Yellen to speak later in the week
* Monsanto jumps after Bayer's $62 bln buyout offer
* Indexes up: Dow 0.16 pct, S&P 0.04 pct, Nasdaq 0.36 pct (Adds details, changes comment, updates prices)
By Tanya Agrawal
May 23 (Reuters) - A rise in Apple's stock helped boost the Nasdaq and the Dow, while the S&P 500 was little changed in late morning trading on Monday.
The benchmark Philadelphia SE Semiconductors Index was also up 1.2 percent, following a 3.2 percent rise on Friday, after a report that the iPhone maker had asked its suppliers to prepare 72-78 million units, above the market's expectation of 65 million units.
Apple's shares rose 1.85 percent to $96.91.
Investors are also awaiting speeches by several U.S. Federal Reserve officials this week for further clues on the trajectory of rate hikes, with Fed Chair Janet Yellen speaking on Friday. Continuación...