The opinions expressed here are those of the authors.

By Anna Szymanski

June 5 (Reuters) - One week, six charts. Every Friday, Market Map will provide you with a wrap-up of the financial week with six key charts selected by Reuters Open Interest (ROI) columnists. We'll highlight major trends – but also surprising and sometimes overlooked moves.

We've said a lot this week, so now we'll let the data do the talking.

(1) DARK OIL

RON BOUSSO, ROI Energy Columnist: The trickle of tankers exiting the Strait of Hormuz has gathered pace in recent weeks, as traders adopt stealth measures to make the crossing. Traffic through the strait remains a fraction of pre-war levels, but a closer look at oil stocks inside the Gulf tells a more nuanced story.

(2) SURPRISE, SURPRISE

MIKE DOLAN, ROI Finance & Markets Columnist: The U.S. economic surprise index compiled by Citi, which measures the extent to which incoming economic data is beating forecasts, has climbed to its highest level since 2023 as the Iran war and energy shock unfold and the AI investment boom continues apace.

(3) BUYERS' STRIKE

CLYDE RUSSELL, ROI Asia Energy and Commodities Analyst: China's seaborne imports of crude oil dropped to the lowest level in nearly a decade as refiners balked at paying higher prices sparked by the war in Iran and the resulting effective closure of the Strait of Hormuz. The drop of almost 5 million bpd from pre-war levels is helping to cushion the loss of volumes through the strait. But there are questions as to how long China will be willing to use up inventories and avoid imports.

(4) TALK IS NOT CHEAP

JAMIE MCGEEVER, ROI Markets Columnist: If you want evidence that we are in an AI bubble, I present you exhibit A. On June 2, shares in Marvell Technology surged 32.5%. What triggered this record rise? It wasn't a sales or profit upgrade, news of incoming investment, or takeover speculation, but five words from Nvidia CEO Jensen Huang, who called the firm "the next trillion-dollar company." Marvell's market cap three months ago was $75 billion. It's now over $250 billion. Whether it gets to the $1 trillion mark is an open question, but it's on the right path.

(5) WILL HE, OR WON'T HE?

ANDY HOME, ROI Metals Columnist: All eyes in the copper world are on this chart right now as the market assesses the probability of U.S. President Donald Trump imposing import duties on refined copper. The U.S. price traded on the CME is commanding a rising premium over the international price traded on the London Metal Exchange ahead of the decision expected at the end of June.

(6) HELPING HAND

GAVIN MAGUIRE, ROI Global Energy Transition Columnist: South American crude oil supplies have been overlooked so far this year, but they have grown faster than in any other region and are playing a meaningful role in helping to keep global energy markets relatively well balanced despite the Middle East turmoil.

Opinions expressed are those of the authors. They do not reflect the views of Reuters News, which, under the Trust Principles, is committed to integrity, independence, and freedom from bias.