Example answer from an AI agent connected to Bigdata.com. Every claim cites its source.
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Sample prompt
How do mill margins, output cuts and steel inventories in China feed through to rebar and iron ore prices?
Mysteel
Answer grounded in Bigdata.comCaptured 2 Oct 2026
Margins are still where it starts. In Mysteel's latest weekly survey, only 6.93% of the 247 blast-furnace mills it tracks were profitable, and their daily hot metal output fell another 18,700 tonnes to 2.34 million tonnes 1. Iron ore feels it first: the same mills' imported ore use slipped to 2.86 million tonnes a day while their ore stocks rose to 95.9 million tonnes, about 33.5 days of use 2, so with holiday buying done, portside trading thinned and ore prices stayed on the weak side 3. Losses are also pushing costs down the chain: mills started a first round of coke price cuts, and analysts expect hot metal output to fall further after the October 1-7 holiday 4. Rebar is steadier. Output rose 4.2% to 1.72 million tonnes in the week to September 30, but mill stocks fell for a third week and traders' stocks for a fifth, to 4.15 million tonnes 5. Mysteel's national rebar price edged up to Yuan 3,325/t on September 29, though end-users resisted higher prices as pre-holiday restocking faded 6.
Sources
1
Mysteel: 247 steel mills' daily average pig iron output is 2.3379 million tons, a weekly decrease of 18,700 tons
InfoQuanta · News · 1 Oct 2026
2
Mysteel: Total inventory of imported iron ore in domestic steel mills increased by 297,400 tons
InfoQuanta · News · 2 Oct 2026
3
DAILY: Seaborne iron ore index keeps largely stable amid weakening liquidity
Mysteel · Daily report · 30 Sep 2026
4
DAILY: Chinese steelmakers initiate first met coke price cut
Mysteel · Daily report · 30 Sep 2026
5
Mysteel: Rebar production increased from a decrease in the week ended September 30
InfoQuanta · News · 2 Oct 2026
6
DAILY: China rebar prices rebound, trading cools ahead of holiday
Mysteel · Daily report · 30 Sep 2026
In the index
Recently in Mysteel
What 57 stories from Mysteel on Bigdata.com were about, 2 Sep 2026 to 15 Oct 2026.
01
Cobalt salt prices hold weak on soft demand
Cobalt salt trading stayed thin as cheaper intermediates eroded cost support and LFP substitution curbed cobalt sulfate demand.
Cobalt Daily: The cobalt salt market in a sideways phase with prices stabilizing and weak trading activity15 Oct 2026
Cobalt Daily: Cobalt salt markets run weakly and actual transaction prices show signs of tilting toward the lower end of the range24 Sep 2026
Cobalt Daily: Cobalt salt prices to run weakly amid sluggish demand in the short term4 Sep 2026
02
Trade probes and duties target Chinese exports
The EU opened a PVC anti-dumping probe, South Africa set provisional duties on color-coated steel and Canada began a truck tire investigation.
EU launches anti-dumping probe into China's PVC24 Sep 2026
South Africa slaps provisional AD duties on Chinese color-coated steel2 Sep 2026
Canada launches AD/CVD probe into Chinese TBR tires3 Sep 2026
03
Copper concentrate supply stays tight
Negative treatment charges, Escondida strike risk and high refined copper premiums reflect tight supply and pressure on smelters.
DAILY: Escondida strike risk remains with copper prices volatile15 Oct 2026
Mysteel surveys showed weekly rebar output at multi-month lows in September, while spot and futures prices kept easing into October.
WEEKLY: China's rebar output drops to intra-year low24 Sep 2026
WEEKLY: China's rebar output drops to 6-month low4 Sep 2026
DAILY: China's rebar market edges down further15 Oct 2026
Ask your agent
What did Mysteel report about cobalt salt prices and demand in recent weeks?
Which trade probes on Chinese exports has Mysteel covered recently?
How does Mysteel describe copper concentrate supply and treatment charges?
Themes are summarised from the stories listed under each one. Captured 16 Oct 2026.
Coverage
What's covered
Mysteel
Delivered through Mysteel. Coverage from China in English. Archive on Bigdata.com since 2019.
Part of
Mysteel: Commodity Intelligence.
Cited answers
Answers link to the source they draw on.
Overview
About Mysteel
Connect it through the Bigdata MCP server and your agent can search it and cite what it finds.
About Mysteel
Mysteel is China's largest commodity market intelligence provider and its first IOSCO-compliant price reporting agency, known for first-hand market reporting.
At a glance
SourceMysteel
Delivered throughMysteel
CountryChina
LanguageEnglish
HistorySince 2019
Volume13K+ documents
UpdatesReal-time
UniverseSteel and iron ore, base metals, battery materials, energy and chemicals, agriculture, construction materials
GeographyChina plus global exchanges
DeliveryMCP, API, Bigdata app
Websitemysteel.net
Setup guide
Connect Mysteel to your agent
1
Add the Bigdata MCP server
Add Bigdata.com as a connector in Claude, ChatGPT, Microsoft Copilot or your own agent.
What is Mysteel Commodity Intelligence on Bigdata.com?
A news package combining Mysteel's commodity reporting and InfoQuanta's flash news on Chinese and global markets, searchable by AI agents through Bigdata's MCP server and API.
Which commodities and exchanges does it cover?
Steel and iron ore, base metals, battery materials, energy and chemicals, agriculture and construction materials, across SHFE, DCE, CZCE, INE, GFEX, LME, CME, CBOT, COMEX, NYMEX and ICE.
Is the content in English?
Yes. Mysteel's articles are in English, and InfoQuanta's flash news is published in English and Simplified Chinese.
Can ChatGPT access Mysteel?
Yes, through the Bigdata MCP server. Once it is connected, ChatGPT can search Mysteel and cite what it finds.
How do I connect ChatGPT, Claude, Copilot or Grok to Mysteel?
Add the Bigdata MCP server to ChatGPT, Claude, Microsoft Copilot or Cursor and sign in. For Grok, add it as a remote MCP tool in the xAI API, using a Bigdata API key. Then ask about Mysteel in plain language. Answers cite the sources they use.
Is it included in my subscription?
It is included with the Financial Newswires package. Contact sales@bigdata.com to add it.
How far back does it go?
Bigdata.com's Mysteel archive goes back to 2019.
Start building with Bigdata.com
Connect through the Bigdata MCP server or API. Every answer cites its source.
