* Tropical depression forming in mid-Atlantic -NHC
* Chinese manufacturing shrank in July -HSBC PMI
* Coming Up: U.S. manufacturing PMI; 1400 GMT
* For a technical view, click: [
] (Updates tropical cyclone likelihood, prices)By Alejandro Barbajosa
SINGAPORE, Aug. 2 (Reuters) - Oil rose towards a 12-week high above $79 on Monday, driven by investor appetite for risk, with macroeconomic indicators in top energy consumers the United States and China showing slower but sustained growth.
Money managers increased net long crude oil positions, bets that prices would rise, to the highest level since May on the New York Mercantile Exchange in the week to July 27, the Commodity Futures Trading Commission said on Friday.
"Long positions are starting to creep back into the market," said Ben Westmore, a commodities analyst at National Australia Bank in Melbourne.
"It's a gradual process of regaining confidence that there is not going to be a default soon," he added, in a reference to the euro zone's debt crisis.
For a graphic on crude net long positions: http://graphics.thomsonreuters.com/10/CFTC_Crude300710.gif
U.S. September crude <CLc1> rose as much as 40 cents to $79.35 a barrel and was up 30 cents at $79.25 by 0615 GMT, having reached a 12-week high of $79.69 last week and climbed 4.35 percent last month. ICE Brent <LCOc1> gained 22 cents to $78.40.
"The market is aware of the fact that it's going to be a pretty slow recovery in the U.S. and the euro zone, so although oil demand will grow over the next 12 months or so, it's going to be a slow, gradual process," Westmore said.
SLOWLY BUT SURELY
U.S. gross domestic product expanded at a 2.4 percent annual rate, missing expectations for growth of 2.5 percent, after upwardly revised 3.7 percent growth pace in the first quarter.
"People are looking more closely at the U.S. GDP number and although the core of the market was disappointed, it was not too far from expectations and there was a revision upwards to the first quarter," said Westmore. "It was slightly more positive."
China's official purchasing managers' index (PMI) fell to a 17-month low in July of 51.2 from 52.1 in June, the China Federation of Logistics and Purchasing (CFLP) said on Sunday.
The PMI is designed to provide a timely snapshot of business conditions and a figure above 50 indicates expansion. [
]On Monday, an index based on a nationwide survey of business executives conducted for HSBC showed Chinese manufacturing shrank in July for the first time since the global downturn in March 2009 on government steps to slow bank lending and fight property speculation. [
]Although the index pointed to a month-on-month contraction in manufacturing, it was still consistent with annual growth in Chinese industrial production of 11-13 percent, HSBC said.
Asian stocks rose on Monday as investors snapped up shares of firms with robust corporate earnings, helping the market shrug off the lacklustre U.S. and Chinese economic data. [
]STORM BREWING
A tropical cyclone forming in the mid-Atlantic also lent support to oil prices as the hurricane season enters what in recent years has been a period of peak activity between August and early October. Atlantic storms sometimes enter the Gulf of Mexico, posing a threat to U.S. and Mexican oil infrastructure.
The U.S. National Hurricane Center (NHC) said late on Sunday that a tropical depression may be forming in the mid-Atlantic, assigning a 90 percent likelihood that the system may become a tropical depression within the next day or so.
Attention this week will remain on U.S. economic data, with the Institute for Supply Management manufacturing index expected later on Monday, followed by July payrolls on Friday.
U.S. crude inventories posted their biggest weekly increase since 2008 in the week to July 23 as imports surged, while gasoline stockpiles climbed for a fifth consecutive week and supplies of distillates including diesel for a ninth. [
] (Editing by Michael Urquhart)