By Joseph Adinolfi, MarketWatch

The dollar started the month off strong on Wednesday, as a spate of strong U.S. economic data suggested growth remained robust in June, providing more justification for Federal Reserve policy makers to raise interest rates this year.

ADP's June estimate for private-sector hiring beat estimates (http://www.marketwatch.com/story/private-sector-adds-237000-jobs-in-june-adp-2015-07-01-891185) by nearly 20,000 jobs, quickly sending the dollar through 123 yen, and the euro below $1.11. The dollar had found resistance at both of those levels earlier in the session.

The ADP number has underestimated the Labor Department's reading on jobs growth during five of the past seven months. Paul Dales, a senior U.S. economist at Capital Economics, said there's a chance the June nonfarm payrolls number could surprise to the upside -- maybe even as high as 290,000.

Economists polled by MarketWatch forecast that 225,000 new jobs were created in June.

The headline ISM manufacturing index came in at 53.5%, beating expectations by about 0.3%. The dollar continued to strengthen after the report.

Federal Reserve policy makers said they would be cautious about raising interest rates at their June meeting, reiterating that the timing of the first interest-rate hike remains "data dependent." Wednesday's data indicated the economy is on track to meet their criteria.

The dollar traded at 123.10 yen, up from Yen122.43 late Tuesday in New York. The euro traded at $1.1068, down from $1.1131 late Tuesday.

The U.S. Dollar Index , a measure of the dollar's strength against a basket of six currencies, was up 0.7% at 95.9520 after the report.

The dollar also traded higher against the pound and the Canadian dollar .

Hopes for a deal between Greece and its international creditors were dashed early Wednesday after creditors rejected the country's latest proposal (http://www.marketwatch.com/story/fresh-greek-bailout-proposals-fall-short-of-creditors-demands-2015-07-01) for a new bailout. The euro briefly spiked on the news, continuing a trend of the common currency rallying when the Greek situation deteriorates.

Traders are now looking ahead to the Labor Department's nonfarm payrolls report for June, expected Thursday morning at 8:30 a.m. Eastern.

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