US STOCKS-Wall St little changed, set to end quarter higher
* S&P 500, Nasdaq to add to string of quarterly gains
* BNY Mellon shares up as Trian discloses stake
* MannKind rallies on approval of inhaled insulin
* Indexes: Dow flat, S&P 500 up 0.1 pct, Nasdaq up 0.2 pct (Updates to morning trading, adds comment)
By Rodrigo Campos
NEW YORK, June 30 (Reuters) - U.S. stocks were little changed on Monday following mixed economic data, with the S&P 500 and Nasdaq Composite indexes set to close a sixth straight quarter of gains - a streak not seen in more than 14 years.
Following a 30 percent gain on the S&P 500 index last year, many investors had expected a halt to an equity bull market that is now into its fifth year.
Still, even as the U.S. Federal Reserve has gradually been easing back its economic stimulus, major indexes are up for the first half of the year and the S&P 500 has posted more than 20 record highs at the close. Bond yields, expected to have risen after a run-up late last year, have broadly fallen.
"The Fed and other global monetary forces have done their best to keep this market as liquid as possible, and that liquidity is restricting investors from finding a place other than stocks and have enabled risk takers to stay confident," said Rick Meckler, president of investment firm LibertyView Capital Management in Jersey City, New Jersey. Continuación...