🚨 \*\*DD: Fortuna Mining ($FSM)\*\*
\*\*Ticker:\*\* NYSE: FSM
\*\*Current price:\*\* \\\~$8.56
\*\*My average:\*\* $8.52
\*\*My position:\*\* 1,873.96 shares / \\\~$16,041
\*\*Position size:\*\* 99.16% of my Roth IRA
Yes, I’m basically all-in.
And before anyone says it:
\*\*I know this is fucking stupid from a portfolio-construction standpoint.\*\*
But I think Fortuna Mining is one of the more interesting asymmetric setups in the gold-mining space right now.
The market appears to be valuing Fortuna primarily as a \*\*\\\~300k GEO/year producer\*\*, while the company is simultaneously building toward \*\*500k+ ounces/year\*\* and has a new mine with a \*\*$1.0 BILLION after-tax NPV\*\* sitting in the development pipeline.
The stock is around \*\*$8.50\*\*.
Here’s the thesis.
🏆 \*\*The elevator pitch\*\*
Fortuna currently operates:
Séguéla — Côte d’Ivoire
Lindero — Argentina
Caylloma — Peru
And is developing:
\*\*Diamba Sud — Senegal\*\*
The company produced \*\*317,001 GEO in 2025\*\* and generated \*\*$330M of free cash flow\*\* for the year. Q4 alone generated $132.3M of FCF.
For 2026, management guides to:
\*\*281k–305k GEO\*\*
with consolidated AISC guidance of:
\*\*$1,830–$1,975/GEO.\*\*
That’s the existing business.
The really interesting part is what’s coming next.
💰 \*\*THE BIG ONE: DIAMBA SUD\*\*
This is what got me interested.
Fortuna released the Diamba Sud feasibility study on June 29, 2026.
At \*\*$3,500 gold\*\*, the project has:
\*\*After-tax NPV5:\*\*
\*\*$1.009 BILLION\*\*
\*\*After-tax IRR:\*\*
\*\*60%\*\*
\*\*Payback:\*\*
\*\*\\\~1 year\*\*
At $4,000 gold:
\*\*NPV:\*\*
\*\*$1.287 BILLION\*\*
\*\*IRR:\*\*
\*\*72%\*\*
And these aren’t PEA numbers anymore.
This is the \*\*feasibility study\*\*.
🤑 \*\*The production profile is ridiculous\*\*
Diamba Sud is expected to produce:
\*\*158,000 oz/year average during the first four years\*\*
and:
\*\*116,000 oz/year average over the 9.4-year mine life.\*\*
Average AISC:
\*\*$1,056/oz during the first four years\*\*
and:
\*\*$1,332/oz over the entire mine life.\*\*
Initial capex:
\*\*$397.5M.\*\*
First gold:
\*\*Q2 2028\*\*
And here’s the kicker:
Fortuna says Diamba Sud + the Séguéla expansion are expected to push annual gold production to \*\*more than 500,000 oz in 2028\*\*—roughly a 60% increase from today’s production rate.
🤔 \*\*“Okay, but it’s a $1B NPV project. Why isn’t the stock already $20?”\*\*
That’s the interesting part.
Because the market isn’t giving Fortuna anything close to full credit for Diamba Sud.
At \\\~$8.56/share and \\\~296M shares outstanding, you’re looking at roughly:
\*\*\\\~$2.5B equity value\*\*
Fortuna’s July 10 share count was 295.96M.
So you’re essentially paying around \*\*$2.5B for the entire company\*\* while Diamba Sud alone has a \\\~$1B after-tax NPV at $3,500 gold.
And that NPV doesn’t include the full value of the existing producing mines.
🏭 \*\*And the existing business isn’t garbage\*\*
This is important.
I’m not buying some explorer that has a pretty PowerPoint presentation and no revenue.
Fortuna is already producing hundreds of thousands of GEOs annually.
2025:
\*\*317,001 GEO\*\*
\*\*$330M FCF\*\*
\*\*$269.7M attributable net income\*\*
\*\*$0.88 basic EPS\*\*
And 2026 production guidance remains:
\*\*281k–305k GEO.\*\*
🚀 \*\*Séguéla could be the sleeper catalyst\*\*
Everyone is talking about Diamba Sud.
I’m also watching Séguéla.
The company just completed studies for a process-plant expansion that could increase processing capacity to approximately:
\*\*2.3 million tonnes/year\*\*
A construction decision is expected in the coming weeks.
Fortuna is also spending \*\*$48M\*\* on underground equipment/infrastructure and establishing an owner-operator team for the Sunbird underground project.
So Diamba Sud isn’t the only growth lever.
🐂 \*\*THE BULL CASE\*\*
Let’s say gold remains elevated.
Diamba Sud gets permitted.
Construction stays on schedule.
Séguéla expansion works.
No massive dilution.
Fortuna reaches \\\~500k+ oz/year around 2028.
At that point, I think the market could reasonably value FSM substantially higher than today.
My rough bull-case framework:
\*\*$15–20\*\*
\*\*Very achievable if execution stays on track and the market begins valuing Diamba Sud.\*\*
\*\*$20–30\*\*
Possible if gold remains strong and Fortuna successfully transitions toward 500k+ GEO production.
\*\*$30+\*\*
Would require a combination of high gold prices, strong execution, successful expansion, and a significantly higher valuation multiple.
I’m not saying $30 is the base case.
I’m saying the \*\*asymmetry is interesting\*\*.
🐻 \*\*THE BEAR CASE\*\*
This is where people need to pay attention.
I’m not pretending this is risk-free.
\*\*1. Mining is fucking hard.\*\*
Costs can blow out.
Grades can disappoint.
Equipment can fail.
Construction can be delayed.
Political/regulatory problems can happen.
\*\*2. Diamba Sud still has permitting/construction risk.\*\*
The exploitation permit application was submitted in February 2026.
The environmental approval was received in June.
The project is progressing toward FID, but \*\*it isn’t producing gold today.\*\*
\*\*3. Gold prices matter A LOT.\*\*
A gold miner at $4,000 gold is a very different business than one at $2,500.
\*\*4. Senegal isn’t Canada.\*\*
There’s jurisdictional risk.
The Senegalese government will receive a \*\*10% free-carried interest\*\* upon the exploitation permit being granted and may elect to purchase up to an additional 25% contributory interest at a fair price determined through independent valuation.
\*\*5. Development requires capital.\*\*
Diamba Sud’s initial capex is estimated at \\\~$397.5M.
Fortunately, Fortuna says it has \*\*more than $800M of liquidity\*\* and expects to fund development through its existing cash-flow generation and liquidity.
🧠 \*\*One thing I REALLY like\*\*
Management isn’t just talking about buying Lambos.
They’re actually buying back shares.
During Q2 2026, Fortuna repurchased:
\*\*8.6 million shares\*\*
at an average price of:
\*\*$9.32/share\*\*
for $80.2M.
That follows another $20.3M of buybacks in Q1.
They’re literally buying their own stock around prices above where it trades today.
That’s worth paying attention to.
📈 \*\*My rough valuation framework\*\*
I’m not going to pretend I can calculate the exact fair value of a mining company three years into the future.
But here’s how I think about it.
\*\*Today\*\*
\\\~$8.50/share
\\\~$2.5B market cap
Existing production
\\\~$1B Diamba Sud NPV
Séguéla growth
exploration upside
elevated gold prices
\*\*2028 scenario\*\*
If Fortuna reaches its targeted \*\*500k+ annual gold production rate\*\*, and Diamba Sud performs approximately as expected, I think the company could look dramatically different.
At that point, you’re no longer buying:
“a 300k GEO miner.”
You’re buying:
\*\*a 500k+ oz/year producer with a large, low-cost growth asset.\*\*
That deserves a very different valuation.
⏰ \*\*THE CATALYSTS\*\*
This is why I think the timing is interesting.
\*\*August 5, 2026\*\*
\*\*Q2 financial results\*\*
\*\*August 6\*\*
\*\*Earnings call\*\*
Then:
\*\*Diamba Sud mining permit\*\*
↓
\*\*Final investment decision\*\*
↓
\*\*Construction\*\*
↓
\*\*Séguéla expansion decision\*\*
↓
\*\*Sunbird underground\*\*
↓
\*\*Diamba Sud first gold Q2 2028\*\*
🎯 \*\*My personal price targets\*\*
Not analyst targets.
\*\*My own scenario analysis.\*\*
\*\*Bear:\*\*
\*\*$4–6\*\*
Something goes wrong with gold, operations, permitting, or development.
\*\*Base:\*\*
\*\*$15–20\*\*
Diamba Sud proceeds approximately according to plan, gold remains strong, and Fortuna gets some credit for future production.
\*\*Bull:\*\*
\*\*$25–35\*\*
500k+ oz production comes into view, gold stays elevated, Diamba Sud performs well, and the market rerates Fortuna as a major mid-tier producer.
\*\*Fucking bananas:\*\*
\*\*$40+\*\*
Gold stays extremely high + production beats expectations + exploration succeeds + valuation multiple expands.
Possible?
Yes.
Base case?
\*\*Absolutely not.\*\*
🧨 \*\*Why I’m willing to YOLO it\*\*
My investment thesis is basically:
\*\*I’m paying \\\~$2.5B for a company that already produces hundreds of thousands of ounces of gold equivalent, generated $330M of FCF last year, has \\\~$1B of after-tax NPV sitting inside Diamba Sud at $3,500 gold, is buying back stock, and is targeting 500k+ oz/year by 2028.\*\*
And gold is currently nowhere near the $3,500/oz assumption used for the Diamba Sud base-case economics.
The market can absolutely prove me wrong.
But at \\\~$8.50, \*\*I think the risk/reward is compelling enough that I put my money where my mouth is.\*\*
\*\*Position or ban me\*\*
\*\*1,873.96 shares FSM\*\*
\*\*Average cost: $8.52\*\*
\*\*\\\~$16,041 position\*\*
\*\*99.16% of my Roth IRA\*\*
I am either going to look like a genius in 2028 or I’m going to be the guy posting loss porn.
\*\*Let’s fucking find out.\*\*
\*Not financial advice. I’m an idiot on Reddit who owns a ridiculous amount of one gold miner.\*