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Vol. 01 · Issue 01An investing platform · for people who read footnotesSpring 2026
Feature · The launch issue

Clarity at altitude.

The retail investing market is bifurcated. On one side, DIY platforms that hand you a Lambo and a beer. On the other, robo-advisors that treat you like luggage. We built Tarn for everyone in between — readers, learners, savers, and people who want to know why they own what they own.
Take the questionnaire — 5 minRead a sample thesis →Free tier · No card required
01
Chapter 01
The market is bifurcated. We sit between.

DIY platforms — Robinhood, Public — give users full control but no guidance. They often encourage harmful short-term behavior in the name of "engagement." Pure robo-advisors — Betterment, Wealthfront — automate allocation but treat the user as a passive passenger, and reveal almost nothing about why they own what they own.

Titan sits closest to our space, but stops short of per-holding thesis lifecycle communication, genuine user override, and education woven into the experience.

Tarn occupies the space between: automated and thoughtful, but transparent, teachable, and user-steered.

AutoChoiceThesisTeach
Tarn
Titan
Public
M1 Finance
Robinhood
Betterment
Wealthfront
delivered  ·  partial  ·  absent
02
Chapter 02
Six pillars. No more.
NO. 01$1

Low capital floor

Fractional shares down to the cent. Opposite of hedge fund minimums.

NO. 0222

Hyper-personalized

Twenty-two questions, two independent scores: tolerance and capacity.

NO. 03Both

Hybrid robo + DIY

Decline curated picks, add your own. The managed view stays intact.

NO. 04100%

Radical transparency

Thesis, scenarios, targets, valuation, break criteria. Required on publication.

NO. 05Inline

Education in context

Inline tooltips on every metric and concept. Deep dives one tap away.

NO. 06Never

Behavioral protection

Friction where regret lives. Never blocking. Never streaks, badges, or confetti.

03
Chapter 03
From quiz to recommendation, in about ten minutes.
01~5 minutes

A questionnaire

Twenty-two questions across five sections. Tolerance (behavioral) and capacity (financial) are measured independently. The lower of the two is the default — best practice, full stop.

22 questions
02Two scores

Tolerance vs capacity

When capacity is the constraint, we tell you exactly what would need to change for us to move you up. No silent overrides, no opaque scores.

Lower wins
035 risk profiles

A proposed portfolio

Curated ETFs for diversification. Curated stocks inside the equity sleeve, capped per profile. Add your own picks alongside, if you like — we will not touch them.

ETF + Stocks
04Always fresh

Recommendations on a clock

Dual-trigger updates: event-driven (earnings, news, regulation) plus a quarterly review. A thesis is never more than 90 days stale.

≤ 90 days
An excerpt from the questionnaire

"The market drops 30% in one month. Your $10,000 portfolio is now worth $7,000. You would…"

Behavioral scenarios are how we measure tolerance. Asked five different ways, in five different framings — because what people say they'd do, and what they actually do, are different things.

04
Chapter 04
Anatomy of a thesis.

Every curated thesis is a structured document, not a vibe. Fields are required at publication. The break criteria are stated upfront — not retrofitted after the trade goes south. Authors are named. Confidence is graded. The history of every update is preserved forever.

Pull quote · Marisol Hale, Lead Research
"Our standard for publishing a thesis is: we would be embarrassed if a thoughtful person read it, kept their copy, and quoted it back to us at the post-mortem."
Required fields
· Universal description
· Plain-English thesis
· Thesis type tag
· Suitable risk profiles
· Sector / ESG tags
· Typical weight range
· Time to target
· Pre-declared break criteria
· Bull / Base / Bear scenarios
· Probability weights
· Per-pick valuation justification
· Confidence level
· Author and reviewer
· Update log (versioned)
COST
Costco Wholesale · NASDAQ
$178.42
QUALITY · COMPOUNDER
Author · Tarn Research, M. HaleConfidence · High
Members renew at 93% globally. The membership fee — not the merchandise — is the profit engine, and management has barely touched it in seven years. We think the next hike lands within 18 months, dropping ~$1B straight to operating income.
Scenarios · 18-month target
BULL · 25%
$246
BASE · 55%
$208
BEAR · 20%
$152
Why we like the price
FCF YieldWhat we generate per dollar of price3.1%P / EAbove sector, justified by renewal moat48.2PEGCheap for the earnings growth on offer1.42
Thesis breaks if
Renewal rate falls below 90% for two consecutive quarters, or membership fees do not rise by year-end 2026.
1
2
3
4
05
Chapter 05
Three scenarios. Never a single guess.

A point estimate is a fiction with a number attached. Three scenarios force the conversation about what would have to be true — and what we'd take as a sign the thesis isn't working. Probabilities sum to a hundred. Scenarios are immutable once published. Updates produce a new version.

Probability-weighted expected
$200
From $178 · 18-month horizon · COST
$178NOW$246Bull · 25%$208Base · 55%$152Bear · 20%
06
Chapter 06
The Ulysses contract.

On the way home from Troy, Ulysses had himself tied to the mast — because he knew his future self could not be trusted to ignore the sirens. We let you do the same with your portfolio. Set a rule in a calm moment that a panicked moment can't override.

Selling because a thesis broke? Clean path, no friction. Selling because you panicked? You'll see your goal progress, historical recoveries, the broad selloff context, and — if you opted in — a 24-hour cooldown. The cooldown setting itself has a 24-hour delay to change, so you can't unwind it in the moment.

Six layers of override protection
  1. Graduated friction by jump size
  2. Scenario preview, priced against your actual balance
  3. Informed-consent acknowledgment, timestamped
  4. 24-hour cooldown, cancelable within window
  5. Persistent UI flag — the override is always visible
  6. 6-month re-confirmation prompt
Sell flow · reason given: "Worried about market"

Cooldown active · 24 hours

Your sell of COST (47 sh · ~$8,385) will execute Friday 9:30 ET unless you cancel.
Context, not advice
The S&P is down 2.4% today. Selling at today's close would put you behind your retirement target by about 2.1 years.
Thesis status
Intact
Tax bill
$612 short-term
Cancel sellConfirm anyway
07
Chapter 07
Every thesis is signed.

You always know who wrote what you're reading. Theses are authored by the in-house desk or by vetted research partners — never anonymous, never algorithmic. Past contributors are archived. The history of every handoff is preserved.

See the full desk →
Marisol Hale
Founder · Lead Research
12y multi-strat at Greenoak. Quality compounders.
Covers
COST · NVO · TSM · CPRT
Theo Bremmer
Macro & Rates
Ex-fixed income strategist. Quarterly macro memo.
Covers
Macro overlay · IEFA
Anaya Iyer
Energy & Industrials
Ten years sell-side. Cycle reading; bottom-up.
Covers
CAT · CNQ · PWR
D. Park
Consumer & Healthcare
Channel-check obsessive. Reads every footnote.
Covers
COST · UNH · ELV
Asa Lindqvist
International & EM
Stockholm. Northern-rim and EM coverage.
Covers
NVO · TSM · IDXX
08
Chapter 08
Learning is the product.

Education comes in two forms, working together. The first is contextual — tap any metric, anywhere, for a plain-English explanation and a worked example. The second is the dedicated Education tab, for proactive learning, with full topic tracks and every lesson grounded in the live thesis cards using the concept.

What we will not do is gamify it. No streaks. No badges. No leaderboards. No "you completed 7 lessons this week!" celebrations. Tarn's education exists because you want it to.

Inline · tap "FCF Yield" on a card
Free Cash Flow Yield. The free cash a business generates per dollar you pay for it. Higher is generally better. We use it instead of P/E for capital-intensive companies because it reflects what actually ends up in shareholders' pockets.
Read the full lesson →  See 7 holdings using this metric →
Valuation metrics
P/E · P/S · EV/EBITDA · FCF yield · PEG · ROIC
14
Lessons →
Valuation models
DCF · DDM · comparables · sum-of-parts · reverse DCF
8
Lessons →
Portfolio concepts
Diversification · correlation · drift · glidepath · allocation
11
Lessons →
Behavioral finance
Loss aversion · anchoring · Ulysses contracts · overconfidence
9
Lessons →
Taxes & accounts
IRA vs Roth · loss harvesting · wash sale · LT vs ST
7
Lessons →
Macro concepts
Rates · inflation · yield curve · business cycle · rotation
10
Lessons →
09
Chapter 09
What you pay. Plainly.

Free

Test the platform
$0
No card required
Mode
Advisory only — you act manually
Curated picks
Up to 5
Goals
1 goal
Notifications
Buy & broken-thesis (short summaries)
Education
Full Education tab
Start free →

Core

Recommended
Most users
$8
/month or 0.40%/yr AUM — whichever is greater. ≈ $24k crossover.
Mode
Managed mode — auto-execution within authority matrix
Theses
Full cards with scenarios, targets, metrics, breaks, logs
Goals
Unlimited goals and curated picks
Operations
Paper trading · tax-loss harvesting · DCA
Notifications
Weekly digest · event alerts · sector filters
Open a Core account →

Qualified Client

Per SEC Rule 205-3
0.25%
/yr AUM + 15% perf above 8% hurdle · high-water mark
Mode
Everything in Core, plus:
Access
Named-analyst chat · 1 business day SLA
Review
Quarterly 30-min video on request
Sleeves
Custom consultation
Eligibility
$1.1M AUM or $2.2M net worth (excl. residence)
Verify eligibility →
Fees on the dashboard, in dollars. On a $10,000 Core account: $40/yr, billed monthly, shown net of estimated returns. Pricing is held stable post-launch and only revisited when there's a real reason. Any change is announced at least 90 days in advance.
10
Chapter 10
Questions, answered plainly.
What happens to my money if Tarn closes?
Your assets sit at our clearing partner in an account titled in your name, with SIPC coverage. If Tarn disappeared tomorrow, your holdings would not.
Can I add my own picks?
Yes. User-added picks live alongside the curated portfolio. The engine will not touch them, but it will flag concentration and surface relevant thesis status if one exists.
What happens when a thesis breaks?
In Managed mode the engine rotates the position and notifies you. In Advisory we walk you through the exit. Either way, the broken thesis stays in the archive forever — including the version that broke and the post-mortem.
Can I override the risk recommendation?
Yes — downward freely, upward through a six-layer protection stack: graduated friction, scenario preview against your balance, an informed-consent acknowledgment, a 24-hour cooldown, a persistent UI flag, and 6-month re-confirmation prompts.
Will Tarn ever guarantee a return?
No. We can't and we won't. Every projection is scenario-conditional with probability weights. Historical ranges are labeled historical.
What about crypto, options, margin?
Out of scope. You can invest in those on other platforms. Tarn is intentionally narrower.
Keep reading

Continue the issue.

Open a Core account →
02
How it works
From quiz to portfolio in ten minutes.
Read →
03
Pricing
What you pay, in dollars.
Read →
04
Research & Theses
The desk that writes what you read.
Read →
05
Education
Inline. Always. Never gamified.
Read →