https://do not advertise external sites/Article/3929813/Search-results/Low-...

https://do not advertise external sites/Article/3929813/Search-results/Low-grade-manganese-ore-indices-leapfrog-44-price-on-pent-up-demand.html

I don't have a subscription but Metal Bulletin is where Jupiter Mines quotes their weekly average price from.

Sounds like Mauro was correct in high prices lasting for a month - quoted as until end of June in whatever of the article I could read (below):

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Low-grade manganese ore indices leapfrog 44% price on pent up demand

The low-grade seaborne manganese ore price in China rocketed by 32.1% week on week on Friday April 24 after some buyers accepted the first offer made since South Africa went into lockdown on March 26.
Fastmarkets’ manganese ore index 37% Mn, cif Tianjin soared by $1.65 to $6.79 per per dry metric tonne unit (dmtu) on Friday, hitting a new high since November 23, 2018, when the index was $6.84 per dmtu.
Fastmarkets’ manganese ore 37% Mn, fob Port Elizabeth surged by 36.6% or $1.69 per dmtu to $6.31 per dmtu on the same day, a new high since the index was $6.52 per dmtu on April 27, 2018.
“I think there is panic around as there won’t be a lot of material flowing between now and the end of June as we are all at 50% and port loading has been very slow this week,” a producer said.
Several Chinese ore traders and alloy smelters placed orders for material for June or July. Additionally, some traders built positions in expectation of increased demand in...