The Reality of Leverage — TraderzLife Education Series Book 12

LEVEL 5 · WHAT MOVES MARKETS · BOOK 12

In the first half of 2026 a hedge fund returned 439% net to its investors. By the end of July, according to its investor letter as reported, it had lost 67% in a month and sold most of its public stock book to Citadel.

Those two facts are not a reversal. They are the same arithmetic, observed from two ends — and the mechanism that connects them is available at your broker tonight, at a far higher setting than the one that fund was reported to use.

Borrowed money does not change what you own. It changes what a move does to you, and it changes it in a direction that gets worse exactly when you can least afford it.

• The ratio that climbs while you do nothing — a 10% fall on a 4× position takes 40% of your equity, and leaves you at 6.00× without a trade being placed. The debt does not shrink; the loss lands entirely on your side of the quotient
• The move that ends you is 100 ÷ leverage — 25% at 4×, 1% at 100×, and 0.2% at the 1:500 some brokers advertise. On many instruments that is the spread at the Sunday open
• Why forced sellers dump their best assets — a margin call is answered with whatever can be sold at a fair price today, which is rarely the thing that is failing. Why one position in the case study survived untouched: nothing had been borrowed against it
• Filed, held, controlled — the fund's mandatory public filing showed about $3.86bn of plain long shares, and against a disputed peak size no exact fraction can be worked out. What a 13F actually excludes, why two contradictory position lists can both be accurate, and why you are reading your own version of that filing every time you open the positions tab
• The central table — hold the edge constant at a genuinely good 55% win rate and move only the leverage: ruin runs from effectively zero to 38.21% over 200 trades. Same trader, same strategy, same market
• The row where it turns — past roughly 7.5% risk per trade in the model, more leverage makes you both likelier to be wiped out and poorer on a typical path. Not a trade-off: more risk for a worse typical outcome
• What correlation does to all of it — 26 positions in one theme can behave like 1.24 effective bets, swinging 4.58× as much as 26 unrelated positions — a measure of volatility, not a fixed loss, so no simple table can put an exact ruin figure on it
• The cost of carrying — financing at 4× is 16.5% of your equity a year before you are right about anything. At 10× it is roughly half
• What the de-risk ladder is worth — halving at −10% and again at −20%, stopping at −25%. The simple model cannot represent it, so the book quotes no ladder percentages and gives you a test to run on your own record instead

Every simulation in this book is reproducible by you, for free. Every figure in Chapters 9 and 11 comes from a simple model set out in full in Appendix C, which also gives the settings to rebuild each table in the free Risk of Ruin Simulator on this site. Nothing has to be taken on trust.

Tested, not just taught. Every model table was recomputed exactly, and the book's claims about real markets were checked on recorded prices using our own data systems: how far a currency pair moves on an average day, how often moves of 0.2%, 1% and 3.33% actually happen, how stops at round numbers push price, and how correlation behaves under stress. The method and its limits are printed in full.

Seven full-colour diagrams, the arithmetic on one page, and a full sources appendix. Assumes only the books before it.

Honest note: the case study's reported figures disagree with each other — the peak is given as about $45bn by some outlets and about $24bn by another. This book shows the disagreement rather than picking the dramatic number and computes nothing from either; one widely repeated statistic that could not be verified was dropped entirely. No allegation of wrongdoing is made or implied.

Instant PDF download, 116 pages, in colour, readable on phone, tablet or desktop.

Educational purposes only, not trading or financial advice. Most retail CFD accounts lose money; trading leveraged products carries a high risk of losing your money.