Contemplate a Brazilian investor with R$1,000 to allocate every month from January 2000 via June 2026. Each methods beneath use month-end closing costs and pay roughly 2.1% in conversion prices, a 1.1% monetary transactions tax plus a 1.0% foreign money unfold, every time capital strikes offshore.
The primary is dollar-cost averaging: convert and make investments R$1,000 within the S&P 500 each month, regardless of the trade price. No view, no discretion, no pause.
The second is inconceivable. Contributions accumulate at home risk-free charges and convert solely at trade charges recognized upfront as exceptionally enticing, then purchase the identical index. Name it the oracle technique, as a result of it assumes foreknowledge no investor has.
The month-to-month purchaser completed with roughly R$2.92 million. The oracle completed with roughly R$2.17 million. The hole is about R$748,000, or 34.5%, in favor of the investor who by no means tried to be proper in regards to the foreign money.
The result’s price stating exactly, as a result of it’s simple to overclaim. It doesn’t present that foreign money ranges are irrelevant, and it displays one historic path beneath a selected set of assumptions. It exhibits one thing narrower and extra helpful: an ideal reply to the foreign money query didn’t cowl the price of the time spent ready for it. If flawless timing loses, the practical model, hesitant and solely often proper, begins from a worse place.
