US STOCKS-Wall Street ends near flat on cautious note ahead of Fed

(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window)

* Walt Disney shares fall as CEO says program production delayed

* S&P 500 below 50-day moving average

* Indexes: Dow down 0.15%, S&P 500 down 0.08%, Nasdaq up 0.22% (Updates close with volume, other details)

By Caroline Valetkevitch

NEW YORK, Sept 21 (Reuters) - U.S. stocks ended near flat on Tuesday after a broad sell-off the day before, with worries over troubles at developer China Evergrande and caution ahead of Wednesday's Federal Reserve policy news keeping a lid on the market.

Trading was choppy, with the Dow and S&P 500 erasing session gains just before the close, while the Nasdaq finished slightly higher.

Shares of Walt Disney Co fell 4.2% and were the biggest drag on both the S&P 500 and Dow after Chief Executive Officer Bob Chapek said the resurgence of the Delta variant of the coronavirus was delaying production of some of its titles.

Concerns over China Evergrande Group have put investors on edge and added to recent worries over economic growth from the Delta variant.

Persistent default fears overshadowed efforts by Evergrande's chairman to boost confidence in the firm on Tuesday, while Beijing showed no signs it would intervene to stem any effects across the global economy.

"People have been preconditioned to buy pullbacks for most of the last year plus," said Michael James, managing director of equity trading at Wedbush Securities in Los Angeles.

"But that overhead nervousness is still there," he said. "The Evergrande situation is still a black cloud hanging over global markets. Combine that with uncertainty with Fed commentary coming tomorrow, and there's a reluctance to get overly aggressive on the long side."

Investors are waiting for the end of this week's Fed meeting that may shed light on when its massive purchase of government debt will begin to ease.

Officials will reveal new projections as investors also are on alert for any timing on rate tightening.

The Dow Jones Industrial Average fell 50.63 points, or 0.15%, to 33,919.84, the S&P 500 lost 3.54 points, or 0.08%, to 4,354.19 and the Nasdaq Composite added 32.50 points, or 0.22%, to 14,746.40.

S&P 500 industrials led losses among sectors.

Adding to late-day bearishness, shares of American Airlines Group Inc and JetBlue Airways Corp fell after records in Boston federal court showed the United States and several U.S. states on Tuesday filed an antitrust lawsuit against the companies. American Airlines ended down 2.8% while JetBlue fell 4.8%.

The S&P 500 index traded below its 50-day moving average, its first major breach in more than six months. The average has served as a floor for the index this year.

Analysts say a breach of the index's 200-day moving average may now be in sight.

Advancing issues outnumbered declining ones on the NYSE by a 1.32-to-1 ratio; on Nasdaq, a 1.35-to-1 ratio favored advancers.

The S&P 500 posted no new 52-week highs and six new lows; the Nasdaq Composite recorded 41 new highs and 98 new lows.

Volume on U.S. exchanges was 9.73 billion shares, compared with the 9.95 billion average for the full session over the last 20 trading days.

(Reporting by Caroline Valetkevitch; additional reporting by Sagarika Jaisinghani and Ambar Warrick in Bengaluru; Editing by Anil D'Silva and Lisa Shumaker)