Understanding Position Sizing: More Art Than Science in EM

Let's talk position sizing, especially in the context of emerging markets where volatility can make a $COMP-like move on a quiet Tuesday. Forget the fancy Black-Scholes models for a minute; at its core, it's about not blowing up your account. I've seen too many good traders get wiped out by one oversized bet on a 'sure thing' in a thinly traded currency, or an equity that goes ex-dividend and suddenly the spread is wider than the Chao Phraya River. The general rule of risking 1-2% of your capital per trade sounds nice in a textbook, but in EM, where a single news headline can swing $USDTHB 0.5% in minutes and liquidity can vanish like a politician's promise, you often have to dial that back. It's not just about your stop loss; it's about the potential for gap risk, the overnight news from a different hemisphere, and the simple fact that what looks like a great setup on a chart could be completely invalidated by a central bank announcement. It means adjusting your bet not just on your conviction, but on the proven liquidity and political stability of the market you're diving into. Sometimes, half a percent risk is being aggressive. It's a humbling lesson learned the hard way for many.