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PLAIN INTEREST

Money and markets, explained plainly

Edition 000 17 Aug–23 Aug 2026

What will Plain Interest help you understand, one day at a time?

Before Edition 1 begins, this introductory week explains the five-day rhythm: foundations on Monday, market reality on Tuesday, active decision-making on Wednesday, smaller companies on Thursday and crypto on Friday. Each lesson shows the same Answer Path that future editions will use.

01 · Question

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02 · Plain answer

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03 · Picture

04 · Use it

05 · Evidence

Mon · Investing Basics · Foundation

Why start the week with Investing Basics?

Investing Basics builds the foundation for the rest of the week. It starts with what the money is for, when it may be needed, what could go wrong and what it costs, so products and market stories can be judged in context rather than in isolation.

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Tue · Street Smart · Market reality

What does Street Smart help you notice?

Street Smart explains what happens between a financial claim on a screen and the outcome a reader actually receives. It focuses on market mechanics, prices, orders, costs and incentives: the practical details that can turn an apparently simple decision into a different result.

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Wed · Trading · Active application

What do Trading lessons actually teach?

Trading lessons explain the decisions involved in trying to profit from shorter-term price movements: what would trigger an entry, how much is at risk, what would trigger an exit and what execution may cost. They explain the process and its risks; they do not provide trading signals.

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Thu · Small Caps · Specialist equities

Why give small-cap companies their own day?

Small Caps focuses on listed companies with relatively small market values, where limited research, lighter trading and future funding needs can matter as much as the growth story. It helps readers ask better questions without assuming that smaller automatically means better or worse.

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Fri · Crypto · Alternative assets

What will Crypto Friday help you understand?

Crypto Friday explains what cryptoassets are, how networks, tokens, wallets and markets work, and where risk can hide. It separates the technology from the investment case and avoids treating a rising price, technical novelty or fixed supply as proof of lasting value.

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Search plain-English questions…
I’m building foundationsShares, funds, risk and returns →
I want market realityOrders, spreads, custody and fees →
I’m applying the ideaPositions, sizing and exits →
I need specialist contextSmall caps and cryptoassets →