A stylized illustration of a cylindrical cup with blue arrows and lines indicating a swirling or rotational motion inside the cup.
Briefs
 Finance
Free NewsletterPro Login

Warning: Undefined variable $stocks in /var/www/briefs.co/htdocs/wp-content/plugins/oxygen/component-framework/components/classes/code-block.class.php(133) : eval()'d code on line 448

Warning: foreach() argument must be of type array|object, null given in /var/www/briefs.co/htdocs/wp-content/plugins/oxygen/component-framework/components/classes/code-block.class.php(133) : eval()'d code on line 448

Warning: Undefined variable $funds in /var/www/briefs.co/htdocs/wp-content/plugins/oxygen/component-framework/components/classes/code-block.class.php(133) : eval()'d code on line 472

Warning: foreach() argument must be of type array|object, null given in /var/www/briefs.co/htdocs/wp-content/plugins/oxygen/component-framework/components/classes/code-block.class.php(133) : eval()'d code on line 472
/* the link was here */
×
Free investor livestream — Nov 17

How To Use ChatGPT & Claude To Research Stocks Like A Pro

01
The prompt we use to break down any stock
02
How to fact-check what AI tells you
03
How to compare two stocks in minutes

Rio Tinto halts underground work at Oyu Tolgoi after rockfall

Nate Gregory
Published Oct 29, 2026
Share:
Summary:
  • Rio Tinto paused underground mining at Mongolia's Oyu Tolgoi after a Thursday rockfall triggered by a seismic event injured three workers.
  • On Friday the company said underground operations are on hold for a safety review; Oyu Tolgoi is running at an annualized 450,000 tons of copper per year.
  • Rio Tinto owns 66% of Oyu Tolgoi; there is no smelter on-site, and semi-processed ores are shipped to northern China for processing.

What happened

A seismic event on Thursday set off a rockfall in the underground areas of Oyu Tolgoi, injuring three workers. By Friday, Rio Tinto said underground operations were suspended while it conducts a safety review.

The mine and its output

Oyu Tolgoi ranks among the largest copper and gold deposits globally, with about 80% of its value located underground. The latest operational update puts copper output on an annualized pace of 450,000 tons per year. The facility lacks an on-site smelter, and it sends a large volume of semi-processed ores to northern China, where they are processed. Rio Tinto holds a 66% stake.

Market impact and supply context

Rio Tinto shares dropped up to 2.9% during early trading in Sydney after the pause. Disruptions at the mine could add pressure to an already scarce supply of feedstock.

Unexpected operational interruptions remind investors to look for smarter ways to manage risk. We're hosting our first ever investor livestream on 11/17 to show you how to use ChatGPT and Claude to invest like a pro, hosted by Briefs Finance CEO Jaspreet Singh. Save your seat.

What it means for investors

In plain English: a safety stop at a top copper asset can shape concentrate availability and price expectations. Watch for the safety review timeline and any updated guidance from Rio Tinto, since the duration of the halt will drive both operating and market effects. Copper exposure in your portfolio is the most direct lever here.

Learning how new tools can identify opportunities quietly changes an investor's advantage. On 11/17, our CEO Jaspreet Singh goes live for our first ever investor livestream on how to use ChatGPT and Claude to invest like a pro. Register to join him.

Disclosure

Recent News

1 2 3 … 114

Get Market Briefs delivered to your inbox every morning for free!

No fluff. No noise. No politics. Just finance news you can read in 5 minutes.

Blogs

October 23, 2026
Are We in a Recession? 5 Threats to the Economy and Where the Money Is Moving
By Andre Savage
  • The S&P 500 is up about 13% this year, but without AI it's in a bear market, with nearly 40% of its companies down more than 20% for four months or longer.
  • Jackson, Briefs Finance's head of investing research, sees five threats: rising interest rates, sticky inflation, an economy propped up by AI, a struggling UK, and high oil prices.
  • The opportunities he's watching mostly sit outside the dollar: rising economies like Brazil and Indonesia, US-backed emerging market bonds paying 7% to 9%, and the shifts that fear creates.
Read More
October 16, 2026
How Boring Math Makes You Rich: The Briefs Money Spreadsheet, Explained
By Nate Gregory
  • Briefs Money shows you what to do with every paycheck, and in what order: how much to spend, save, and invest, when to build an emergency fund, and which debt to pay off first.
  • The Climb to Wealth course walks you through the system step by step, and the Personal Finance Spreadsheet is where you track your own numbers.
  • Investing is one piece of building wealth. The system that gets money to your investments, and keeps it there, decides the outcome.
Read More
October 16, 2026
Common Investing Mistakes: Why a Stock Grade Is One Tool, Not the Whole Toolkit
By Jackson Moreland
  • The Briefs Score shows growth, income, and wealth preservation investors how well a stock fits their goal, with a separate letter grade for each one.
  • The most common mistake is treating the letter as an instruction. An A tells you a stock scores well for one goal, not that you should buy today.
  • Research works best as one input in a process you own. The grade shows how a stock stacks up. You supply the goal, the timeline, and the rules for being wrong.
Read More
October 16, 2026
How to Read a Company's Numbers Without a Finance Degree (Using Briefs Terminal)
By Andre Savage
  • Briefs Terminal lets you size up any public company in about ten minutes: what the stock costs, what it earns, how fast sales are growing, and what it pays you, all on one page.
  • It lines those numbers up against the company's closest competitors for you, so you can tell if a number is impressive or just average.
  • Below that are the income statement, balance sheet, and cash flow statement from the company's SEC filings, the latest news, and transcripts of its earnings calls.
Read More
October 16, 2026
What Type of Investor Am I? The Three Investor Archetypes, Explained
By Milena Thomas
  • Briefs sorts its stock grades and monthly reports by three investor goals: growth, income, and wealth preservation. Pick yours and you know which report and which grade to read first.
  • Growth investors want stocks that beat the S&P 500. Income investors want to get paid in cash. Wealth preservation investors want stocks that hold up when the market drops.
  • The same stock can score an A- for one goal and a D- for another, so picking your goal comes before picking any stock.
Read More
October 16, 2026
How to Build a Stock Watchlist That Isn't Just Stocks You Heard About
By Kalbir Talwar
  • A watchlist on Briefs Terminal lets you group stocks by the idea you're tracking and follow each one's price, one-day move, and 52-week high and low in one place.
  • Each list has its own name and description, so you always know why a stock is on it, and you can make as many lists as you have ideas.
  • The monthly growth, income, and wealth preservation reports under the Briefs Research tab hand you new themes to track that you didn't hear about online.
Read More
October 16, 2026
How to Choose an ETF That Matches Your Idea (Using the ETF Planning Tool)
By Jackson Moreland
  • The ETF planning tool takes an idea like "I want to invest in fast food companies," asks what you mean, and finds the ETFs that match, with the reasons, the holdings, and the sources.
  • Build a Plan then shows what your money could grow to in those ETFs over the years you choose, with conservative, expected, and optimistic estimates next to the S&P 500.
  • It gets you from an idea to an actual plan without researching dozens of companies one at a time.
Read More
October 16, 2026
Is This Stock a Good Buy? How to Use the Briefs Score to Tell If a Stock Fits the Way You Invest
By Nate Gregory
  • The Briefs Score shows growth, income, and wealth preservation investors how well a stock fits their goal, with a separate letter grade for each one.
  • One stock can score very differently for each. Nvidia showed an A- for growth and a D- for income, because it grows fast and pays almost no dividend.
  • Seven sub scores under each grade show what earned the letter, so you can see exactly where a stock is strong or weak for your goal.
Read More
October 16, 2026
How to Tell an Asset From a Liability: The One Question to Ask Before You Buy Anything
By Briefs Finance
  • The typical American household earned more in 2025 than in any year on record, yet only 30% of Americans say they could pay a surprise $1,000 bill from savings, so the problem isn't income but what the income gets spent on.
  • An asset puts money in your pocket and a liability takes money out, and the wealthy buy assets first, then let the assets pay for the fun stuff.
  • Before you buy anything, ask one question: does this put money in my pocket, or take money out of my pocket? Then you need a plan for the money you keep.
Read More
October 16, 2026
How to Build Your First $2,000 Emergency Fund and Wipe Out Every Debt Over 10%
By Briefs Finance
  • Your first money goal isn't investing, it's $2,000 in its own account named Do Not Touch, built by moving 10% of every paycheck into it automatically.
  • More than a third of American adults couldn't cover a $400 surprise bill with cash or savings, according to the Federal Reserve, and that's how one bad day turns into years of credit card payments.
  • Once the $2,000 is there, attack every debt charging more than 10% interest, highest rate first, because you can't out-invest a 22% credit card so paying it off is the investment.
Read More
1 2 3 … 29
Share via
Facebook
X (Twitter)
LinkedIn
Mix
Pinterest
Bluesky
Tumblr
Skype
Buffer
Pocket
VKontakte
Parler
Xing
Reddit
Line
Flipboard
MySpace
Delicious
Amazon
Digg
Evernote
Blogger
LiveJournal
Baidu
MeWe
NewsVine
Yummly
Yahoo
WhatsApp
Viber
SMS
Telegram
Facebook Messenger
Like
Email
Print
Copy Link
Copy link
CopyCopied