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Portfolio Management

Building, sizing, rebalancing and maintaining a portfolio you can actually hold through a bad year.

Owning good businesses is half the job. The other half is building a portfolio you can hold through a bad year: sizing positions, diversifying without diworsifying, knowing when to buy and sell, and rebalancing on purpose rather than on emotion.

14 articles in this module

How to Build an Investment Portfolio: A Process

How to build an investment portfolio step by step: from your first stock to a coherent set of businesses, using a quality list, valuation, and sensible sizing.6 min read

Diversification Explained: How Much Is Enough

Diversification spreads your money so one failure cannot ruin you. Learn what it protects against, what it cannot, and where adding names stops helping.6 min read

Concentrated Investing: The Case for Fewer Bets

Concentrated investing means owning a handful of businesses you know deeply. Learn the honest case for it, who it suits, and the brutal demands it makes.6 min read

Portfolio Allocation: How to Size Your Positions

Portfolio allocation is deciding how much weight each holding gets. Learn position sizing by conviction, why cash is an option, and simple layouts to adapt.6 min read

When to Buy a Stock: A Process, Not a Timer

When to buy a stock is a process, not a market call. Learn the checklist that triggers a purchase, why buying in tranches beats a lump sum, and why waiting fails.6 min read

When to Sell a Stock: The Hardest Skill

When to sell a stock is investing's hardest decision. Learn the three good reasons to sell, the bad reasons that trap investors, and why price alone never counts.7 min read

Portfolio Rebalancing: On Purpose, Not on Emotion

Portfolio rebalancing means resetting position sizes back toward your plan. Learn calendar vs threshold methods, and how taxes and costs punish overdoing it.6 min read

Managing Investment Risk: Avoiding Ruin

Managing investment risk means guarding against permanent loss, not price swings. Learn why leverage and correlation cause ruin, and the circuit breakers that help.8 min read

Investment Checklists: Why the Best Investors Use Them

An investment checklist turns judgment into a repeatable process, like a pilot's preflight. Learn why they work, a 10-point list, and how the Tenet score fits.7 min read

Common Portfolio Mistakes and How to Fix Them

The most common portfolio mistakes are behavioral, not analytical: overtrading, averaging down, chasing performance. Learn each one and the fix that works.8 min read

Dip vs. Falling Knife: Pullback or Collapse?

A falling knife is a drop that keeps dropping. See how Tenet's dip receipts use drawdown context, reversal evidence and a hard quality gate to read a fall.7 min read

What a Reversal Signal Means (and What Breaks It)

A reversal signal flags a falling stock starting to turn. Learn the four parts Tenet reads, what invalidates each, and why it shows a level not a target.6 min read

Why Tenet Shows No Price Targets

Tenet shows no price targets or buy and sell ratings. See why it publishes estimate revisions, the direction of consensus, and what tracking-since means.6 min read

Momentum Style vs. the Tenet Score

The Tenet Score rates the business; the momentum style times the market. See what each measures and why timing never blends into the composite score.7 min read
Methodology© 2026 Tenet Investing Inc. · Toronto, Canada

Data from Intrinio and Financial Modeling Prep.