The final revelation is that the change in forex volume was not always commensurate with changes in trade volume. A general relationship between trade and forex turnover has been observed, although speculators ensure that currency is exchanged much more frequently than actual goods and services. The two currency pairs registering the greatest unbalance are the CHF/USD and CAD/USD. Forex volume for the former fell much more sharply than trade, while the opposite is true of the latter. One can only speculate as to why this is the case. As for the CHF/USD, forex volume probably suffered disproportionately more because both the Swiss Franc and US Dollar were perceived as safe haven currencies, in which case it would be relatively less useful to exchange them for each other. In the case of the CAD/USD, meanwhile, it makes sense to view the imbalance in terms of the spectacular decline in trade, which was largely a product of declining commodity prices.

It’s impossible to predict whether forex volume will remain depressed. Given the efforts underway to increase regulation and curtail leverage, I don’t personally expect volume to recover for a while. As for the implications, the less might be to stick to the majors. If volume is declining, it will probably affect emerging market currencies most. Lower liquidity might translate into higher volatility. However, it’s worth pointing out that volatility has been declining ever since it skyrocketed after the collapse of Lehman Brothers last fall. In that case, it might be that investors are behaving more prudently with less funds to trade with.