US STOCKS-Wall St drops but S&P, Nasdaq register quarterly gains
* Oil prices weaken for third straight day
* Charter to buy Bright House for about $10 bln
* Nasdaq in longest-ever streak of quarterly gains
* Dow down 1.1 pct, S&P 500 down 0.9 pct, Nasdaq down 0.9 pct (Updates close with latest volume, details on healthcare sector)
By Caroline Valetkevitch
NEW YORK, March 31 (Reuters) - U.S. stocks fell on Tuesday as energy and healthcare shares retreated, but the S&P 500 and Nasdaq registered their ninth straight quarterly advance.
The S&P's 500 quarterly winning streak was its longest since 1998, while the Nasdaq's was its longest ever. The Dow registered a slight loss for the quarter.
During the session, all 10 S&P 500 sectors declined, with healthcare leading the way down. It dropped 1.5 percent, reversing strong gains from the previous day tied to deal activity.
Energy shares also retreated, falling with crude oil. The S&P Energy index declined 0.9 percent, while shares of Exxon Mobil Corp fell 0.7 percent to $85. Continuación...