US STOCKS-Wall St pares losses after falling on stimulus worries
* Early sell-off provides buying opportunities
* BOJ keeps policy steady, disappointing investors
* Lululemon tumbles after CEO says to step down
* Indexes: Dow flat, S&P down 0.3 pct, Nasdaq down 0.3 pct
By Angela Moon and Alison Griswold
NEW YORK, June 11 (Reuters) - U.S. stocks fell on Tuesday following the Bank of Japan's decision to hold monetary policy steady, but indexes were well off lows as investors took earlier dips in the market as a buying opportunity.
The Dow Jones industrial average erased nearly all its losses to trade flat at midday, supported by gains in Pfizer Inc and Unitedhealth Group, both up more than 0.6 percent.
Financial and materials groups led the way down, falling nearly 1 percent each. The utilities sector was flat, faring relatively better.
The decision by the BOJ roiled markets across asset classes. U.S. Treasury yields hit fresh 14-month highs, the yen rose sharply and equities dropped globally. Continued...