World oil prices dived Wednesday and stock markets rallied on fresh hopes for an end to the Iran war.
Washington believes it is close to reaching an agreement with Iran to reopen the key Strait of Hormuz and end the conflict, US news outlet Axios reported, citing two US officials.
International oil benchmark Brent North Sea made a double-digit plunge to under $100 a barrel, before climbing back above that level after US President Donald Trump threatened to restart bombing Iran.
The main US contract, West Texas Intermediate, dived more than 12 percent to under $90 a barrel before paring losses.
European gas prices slumped 11 percent.
European equities got a boost, with the Paris exchange piling on gains of around three percent and both Frankfurt and London up more than two percent.
"The (Axios) news has ignited fresh optimism that we're moving in the right direction for global energy markets, which is supporting a broad risk-on move," noted Saxo UK investor strategist Neil Wilson.
"Bond yields slipped along with the US dollar as risk sentiment picked up with a swifter end to the conflict vital to addressing the market's inflation risk."
According to Axios, the two sides are close to agreeing on a "one-page memorandum of understanding to end the war and set a framework for more detailed nuclear negotiations".
It said the deal would involve Iran committing to a moratorium on nuclear enrichment and the United States agreeing to release billions of dollars of frozen Iranian funds.
Washington is reportedly awaiting a response from Tehran on several key points in the next 48 hours.
"Nothing has been agreed yet, but the sources said this was the closest the parties had been to an agreement since the war began," Axios said.
Wall Street's stock indices also shot higher as trading got underway in New York, with sentiment also buoyed by better-than-expected corporate earnings.
Shares in chip-maker AMD shot 19 percent higher after it posted strong first-quarter figures as well as a rosy outlook, helping other tech stocks.
Both the tech-heavy Nasdaq Composite and S&P 500 set new all-time highs.
"AI growth enthusiasm is in full swing following AMD's earnings report and other developments," said Briefing.com analyst Patrick O'Hare.
Shares in Disney jumped eight percent after the entertainment giant's revenue and earnings outstripped analyst expectations.
Elsewhere on Wednesday, Seoul's Kospi stocks index piled on more than five percent to pass 7,000 points for the first time.
That came on the back of an eye-watering surge by Samsung, which rocketed 14.4 percent to hit a market capitalisation above $1 trillion thanks to huge demand for its AI chips.
Samsung is only the second Asian firm after Taiwan's TSMC to reach the figure. Samsung's shares have risen around 300 percent over the past year as the artificial intelligence boom boosts South Korean growth.
The yen surged against the dollar on what is thought to have been an intervention by Japanese authorities to support the struggling currency.
- Key figures at around 1330 GMT -
Brent North Sea Crude: DOWN 6.0 percent at $103.32 a barrel
West Texas Intermediate: DOWN 5.8 percent at $96.31 a barrel
New York - Dow: UP 1.0 percent at 49,808.59 points
New York - S&P 500: UP 0.6 percent at 7,304.06
New York - Nasdaq Composite: UP 0.6 percent at 25,468.69
London - FTSE 100: UP 2.2 percent at 10,445.04
Paris - CAC 40: UP 3.0 percent at 8,300.75
Frankfurt - DAX: UP 2.1 percent at 24,903.12
Hong Kong - Hang Seng Index: UP 1.2 percent at 26,213.78 (close)
Shanghai - Composite: UP 1.2 percent at 4,160.17 (close)
Tokyo - Nikkei 225: Closed for a holiday
Dollar/yen: DOWN at 156.23 yen from 157.85 yen on Tuesday
Euro/dollar: UP at $1.1748 from $1.1696
Pound/dollar: UP at $1.3603 from $1.3544
Euro/pound: UP at 86.39 pence from 86.36 pence
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