What Do Changes In GLD’s Bullion Inventory Tell Us About The Future Gold Price?

Physical gold ‘flowing’ into GLD and the other gold ETFs does not cause the gold price to rise and physical gold flowing out of gold ETFs does not cause the gold price to fall. The cause and effect actually works the other way around, with the price change being the cause and the flow of gold into or out of the ETFs being the effect. I’ve covered the reasons before (for example, HERE and HERE), but cause and effect are regularly still being mixed up in gold-related articles so I’m revisiting the topic.

The Net Asset Value (NAV) of a gold ETF such as GLD naturally moves up and down by the same percentage amount as the gold price, so a change in the gold price will not necessarily require any change in the size of GLD’s bullion inventory. It’s only when GLD’s market price deviates from its own NAV that a change in bullion inventory occurs. For example, assume that the gold price gains 10%. In this case, GLD’s NAV will gain 10% and there will be no increase or decrease in GLD’s inventory as long as GLD’s market price also rises by 10%. However, if GLD’s market price rises by 11% then gold will be added to the ETF’s inventory to bring its market price and NAV back into line, and if GLD’s market price rises by only 9% then gold will be removed from the ETF’s inventory to bring its market price and NAV back into line.

Note that the manager of the ETF doesn’t have to initiate anything in the above-described process. The ETF’s Authorised Participants (APs) initiate the process in order to generate arbitrage profits. More specifically, a deviation between market price and NAV creates an opportunity for the ETF’s APs to pocket risk-free profits by selling or buying gold bullion and simultaneously buying or selling ETF shares.

All ETFs work the same way. That is, there’s nothing special about the way GLD works. The modus operandi ensures that the market prices of ETFs usually track their NAVs very closely.