Sharpe counts every swing as risk. Sortino counts only the drops. See both worked on 12 months of hypothetical returns, and what it means when they disagree.
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The narrative fallacy is our habit of explaining random events with neat stories. A real example from the markets, why it fools traders, and a 3-question story check.
Leverage should come out of your position size, never go into it. How to work it out from your stop, what each level can survive, and Singapore's CFD margin floors.
A checklist before buying a stock: 7 questions to ask in 60 seconds, for traders and investors, so you never buy on a feeling again.
What changes when you trade for a fund instead of yourself: rules, benchmarks, drawdown limits, the licence, pay and screen time, from a former desk trader.