The dollar was poised for its worst weekly performance in 10 months amid concerns Negative_sentiment about anemic Slow.weak U.S. economic growth .

Oil prices continued to plummet Movement.down.loss Wednesday as concerns Negative_sentiment over limp Slow.weak demand and limited remaining storage capacity lingered .

Crude oil trades close to 5-week low Position.low on U.S. demand concerns Negative_sentiment .

The reports followed disappointing figures on U.S. consumer spending and manufacturing activity earlier in the week , adding to concerns Negative_sentiment over the U.S. economic recovery Grow.strong .

Oil futures increased Movement.up.gain sharply on Monday with Brent crude surging Movement.up.gain above $ 112 for the first time since 2010 on concerns Negative_sentiment that crisis Crisis in Iran could curb Cause.movement.down.loss supplies .

Oil prices declines Movement.down.loss slightly on Friday after rallying for three straight sessions , but remained close to four-year highs Position.high on concerns Negative_sentiment that global supplies will drop Movement.down.loss due to Washington 's sanctions Embargo on the OPEC member nation .

Separately , uncertainty over the future of the Federal Reserve 's stimulus program also dominated markets after a recent string of U.S. economic reports underlined concerns Negative_sentiment over the outlook for the nation 's economic recovery .

Oil futures slide Movement.down.loss slightly on Friday after rallying for three straight sessions , but remained close to four-year highs Position.high on concerns Negative_sentiment that global supplies will drop Movement.down.loss due to Washington 's sanctions Embargo on Venezuela .

LONDON ( Reuters ) - Brent crude oil increased Movement.up.gain towards $ 104.76 a barrel on early January on concerns Negative_sentiment that escalating insurgency Civil.unrest in Iraq could curb Cause.movement.down.loss oil supplies from the major OPEC exporter .

Analysts at consultancy JBC Energy doubt Saudi Arabia is willing to cut Cause.movement.down.loss exports sharply on its own given concerns Negative_sentiment over market share and the strength of demand , as well as OPEC 's ability to agree a swift collective cutback Cause.movement.down.loss .

Investing.com - Oil prices dropped Movement.down.loss on Monday as new tariffs on both the U.S. and China trade dispute took effect , adding to concerns Negative_sentiment over an already-gloomy Slow.weak global economic outlook and lower Movement.down.loss demand for crude .

Oil futures appreciated Movement.up.gain sharply on Monday with Brent crude surging Movement.up.gain $ 63.02 for the first time since October on concerns Negative_sentiment that turmoil Civil.unrest in Libya could trim Cause.movement.down.loss supplies .

Oil fell Movement.down.loss more than $ 1 a barrel on Thursday to a four-year low Position.low below $ 83 a barrel as growing concerns Negative_sentiment over the global economy stretched a four-month rout .

The reasons for the demand uncertainties Slow.weak are many , starting with concerns Negative_sentiment over slowing Slow.weak global growth and tough trade negotiations trade.financial.tension between the US and China .

SINGAPORE/LONDON -LRB- Reuters -RRB- - Energy markets are being battered across the board as negative data fuels concerns Negative_sentiment that consumption of oil , natural gas and coal will be hit hard Movement.down.loss by a global economic slowdown Slow.weak .

However , concerns Negative_sentiment of oversupply Oversupply resurfaced on Monday after Russia reported an increase Movement.up.gain in production in March , to 10.97 million bpd from 10.95 million bpd in February .

Oil prices added Movement.up.gain sharply on Tuesday with Brent crude increasing Movement.up.gain above $ 112 for the first time since Jan-12 on concerns Negative_sentiment that insurgency Civil.unrest in Iran could curb Cause.movement.down.loss supplies .

`` However , supply concerns Negative_sentiment would ease even more should Iraq manage to push militants back to Mosul and also provided Libya continues to ramp up Cause.movement.up.gain production . ''

However , concerns Negative_sentiment over rising Movement.up.gain U.S. oil production continued to linger , especially following reports hits week that U.S. production is expected to exceed 10 million barrels per day -LRB- bpd -RRB- very soon .

Investing.com -- Crude oil futures were down Movement.down.loss for a fifth day on Thursday , trading close to a five-week low Position.low as concerns Negative_sentiment that the U.S. economic recovery Grow.strong was faltering weighed on future demand expectations from the world 's largest oil consumer .

Brent crude rose Movement.up.gain to $ 105 a barrel on Monday to come off of a four-month low Position.low hit in the previous session , with worries Negative_sentiment about global oversupply Oversupply still outweighing concerns Negative_sentiment about violence Civil.unrest in the Middle East and North Africa .

Oil futures falls Movement.down.loss slightly on 1986 after rallying for three straight sessions , but remained close to four-year highs Position.high on concerns Negative_sentiment that global supplies will drop Movement.down.loss due to Washington 's sanctions Embargo on Iran .

`` U.S. sanctions Embargo against Iran ... created serious concerns Negative_sentiment with traders earlier in September .

Meanwhile , U.S. budget concerns Negative_sentiment persisted after Republican leaders in the U.S. House of Representatives refused on Thursday to give in to President Barack Obama 's demand for straightforward bills to run the government beyond September 30 and to increase Movement.up.gain borrowing authority to avoid a default .

Oil futures added Movement.up.gain sharply on Tuesday with Brent crude surging Movement.up.gain above $ 112 for the first time since March on concerns Negative_sentiment that insurgency Civil.unrest in Libya could reduce Cause.movement.down.loss supplies .

Oil futures slide Movement.down.loss slightly on last night after rallying for three straight sessions , but remained close to four-year highs Position.high on concerns Negative_sentiment that global supplies will drop Movement.down.loss due to Washington 's sanctions Embargo on Venezuela .

https://www.reuters.com/news/archive/GCA-Commodities/article/us-markets-oil/brent-crude-falls-to-13-month-low-on-ample-supply-demand-worries-idUSKBN0GC1QK20140812 NEW YORK -LRB- Reuters -RRB- - Brent crude oil fell Movement.down.loss to a 13-month low Position.low on Tuesday as increased Movement.up.gain OPEC production helped dampen concerns Negative_sentiment over potential supply disruptions Cause.movement.down.loss in Iraq and Libya .

Last week , oil finished higher Movement.up.gain on Friday , boosted Cause.movement.up.gain by signs of rising Movement.up.gain crude demand in China , but prices failed to avoid a weekly loss Movement.down.loss amid concerns Negative_sentiment over rising Movement.up.gain production in the U.S. Meanwhile , February Brent crude futures , the benchmark for oil prices outside the U.S. , jumped Movement.up.gain $ 1.20 , or roughly 1.9 % , to settle at $ 63.40 a barrel by close of trade .

`` Fear of global economic growth distress Slow.weak ( is ) afflicting the entire energy complex with concerns Negative_sentiment that consumption will be bad Slow.weak this year , '' Peter Kiernan , lead energy analyst at the Economist Intelligence Unit ( EIU ) , said .

The demand concerns Negative_sentiment from the outbreak pushed Brent and WTI to their lowest Position.low in 13 months on Monday .

Oil futures added Movement.up.gain sharply on Thursday with Brent crude soaring Movement.up.gain $ 66.56 for the first time since October on concerns Negative_sentiment that conflict Civil.unrest in Iraq could cut Cause.movement.down.loss supplies .

Oil prices weakened Slow.weak amid lower Movement.down.loss supply concerns Negative_sentiment from the Middle East after the U.S. and Russia agreed on a draft U.N. Security Council resolution aimed at eliminating chemical weapons in Syria .