How to Track Investments Across Multiple Currencies

Holding assets in more than one currency is increasingly common. A stock portfolio in USD, property in EUR, savings in GBP, maybe some crypto. Each asset might be doing well on its own - but how is the overall portfolio actually performing?

That question is harder to answer than it looks, because currencies move too.

The Problem With Mixed Currencies

Say an investment gained 8% in USD over the past year. Sounds good. But if the dollar dropped 5% against your home currency in the same period, the real gain is closer to 3%. The reverse is also true - a flat investment can look like a winner if the currency it's held in strengthened.

Without accounting for exchange rates, portfolio tracking gives a misleading picture. The numbers might all be going up, but the actual purchasing power could be telling a different story.

Picking a Base Currency

The simplest approach is to convert everything into one currency - usually the one used for daily expenses. This makes totals easy to read and compare month to month.

The downside is that it introduces currency bias. A strong home currency makes foreign assets look weaker, and a weak home currency inflates them. The underlying asset performance gets mixed up with exchange rate movements, making it harder to tell what's actually driving returns.

Using a Neutral Benchmark

One way around this is to use a currency-neutral benchmark. Special Drawing Rights (SDRs), created by the International Monetary Fund, are based on a basket of major world currencies. Because no single currency dominates, SDRs smooth out exchange rate noise and give a more stable view of real wealth changes over time.

This is especially useful for comparing performance across different time periods or between assets held in different currencies. A gain measured in SDRs is less likely to be a currency illusion.

What Good Multi-Currency Tracking Needs

Tracking a multi-currency portfolio effectively comes down to a few things:

  • Historical exchange rates. Not just today's rate, but the rate on the day each value was recorded. This is the only way to calculate accurate returns over time.
  • Automatic conversions. Manually looking up exchange rates for every update is tedious and error-prone. The tool should handle this.
  • A clear total. All assets converted into a single view so the overall position is visible at a glance.
  • Performance in context. Returns that account for currency movement, so it's clear whether gains are real or just exchange rate effects.

How NetFiscus Handles This

NetFiscus is built with multi-currency support from the start. Each asset is tracked in its original currency, and conversions happen automatically using historical exchange rates. The dashboard shows a unified view of total wealth, with investment performance and profit and loss calculated across the whole portfolio.

For a more neutral view, NetFiscus also supports SDR-based tracking - useful for seeing through currency fluctuations and understanding real changes in wealth.

Whether a portfolio spans two currencies or ten, the goal is the same: an accurate, honest picture of how investments are actually performing - not one distorted by exchange rate noise.