* Economic data boosts stock markets and oil futures
* Tropical depression forms in Caribbean, lifts oil
* Dollar weakens vs euro, currency basket and boosts oil
* Coming up: CFTC positions data Friday, 3:30 p.m. EDT (Recasts, updates prices, market activity, changes byline and moves dateline from previous LONDON)
By Robert Gibbons
NEW YORK, July 22 (Reuters) - Oil jumped nearly 3 percent and back above $78 a barrel on Thursday as equities rallied on stronger-than-expected economic data and as a tropical depression looked like it might disrupt Gulf of Mexico production.
A weak dollar, which lowers the value of currency producers receive, also helped push oil prices up after they finished the previous session more than 1 percent lower.
U.S. crude oil for September delivery rose $2.22, or 2.9 percent, to $78.78 a barrel by 12:40 p.m. EDT (1640 GMT), trading as high as $78.95, the highest front-month crude price since crude prices reached $79.38 on June 28.
London ICE Brent futures <LCOc1> rose $1.96 to $77.33.
"You had the euro zone data and equities are very strong despite the jobless claims rising. We've not seen the dollar index getting pounded like this in a while," said Addison Armstrong, analyst at Tradition Energy in Stamford, Connecticut.
"If we get a storm it could be setting up the market to make a run at $80."
Global stocks rose and the euro strengthened on upbeat corporate results, better-than-expected U.S. housing data, and an improvement in European manufacturing and services activity. [
]Tropical Depression 3 formed near the Bahamas, the U.S. National Hurricane Center said on Thursday. The system is expected to strengthen into a tropical storm within 12 hours but not to strengthen into a hurricane before moving inland. [
]All of the weather models forecast the depression to skirt south of Florida and move northwest across the oil producing central Gulf of Mexico before hitting the coast of Louisiana or Texas.
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Link to the NHC: http://www.nhc.noaa.gov/
Link to weather models: http://www.skeetobiteweather.com/
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Thursday's rally pushed oil prices back above two key technical resistance points for a second consecutive day: the 200-day moving, which was $77.62 on Thursday, and a trend line connecting several intraday peaks going back to the April 6. (Graphic: http://link.reuters.com/cyk98m )
Oil received an early lift when European purchasing managers' indexes showed private sector business activity accelerated in July, surprising economists who had expected a slowdown. [
]"I think that this is a very good sign that we are not heading for a double-dip recession," Dekabank analyst Sebastian Wanke told Reuters Insider.
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Reuters Insider interview with Sebastian Wanke:
http://link.reuters.com/ruk78m
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European shares <
> [ ] rose on the survey data, and in anticipation of the results of the European Union's publication of euro-zone bank stress tests from 1500 GMT on Friday. They are expected to show generally positive results for Greece, Italy and Ireland and a few failures in Portugal and Spain. (Additional reporting by David Turner and David Sheppard in London and Alejandro Barbajosa in Singapore; Editing by David Gregorio)