The S&P 500 Index ended higher on Tuesday after a choppy session in which each of the major indexes fluctuated between gains and losses as a key meeting of the Federal Reserve got under way.

MEXICO CITY (Reuters) -Mexico is working with governments of Argentina, Bolivia and Chile to create a lithium association so the countries can share their expertise to exploit the battery mineral, Mexican President Andres Manuel Lopez Obrador said on Tuesday.

The U.S. dollar slipped against a basket of currencies on Tuesday, as investors evaluated how much of the Federal Reserve's expected move to hike rates this week and beyond was already priced in.

U.S. job openings increased to a record high in March as worker shortages persisted, suggesting that employers could continue to raise wages and help keep inflation uncomfortably high.

Wall Street's main indexes rose on Tuesday, as investors picked up shares of financials and beaten-down megacap companies, while staying cautious about the Federal Reserve's ability to tame inflation without impeding growth.

U.S. job openings increased to a record high in March as worker shortages persisted, suggesting that employers could continue to raise wages and help keep inflation uncomfortably high.