Mexico’s gold, as a single cube

The holding

Mexico’s gold reserve, in proportion

Mexico's central bank holds about 120 tonnes of gold — a mid-tier holder, 33th of the 38 nations the World Gold Council tracks. That is a number most people cannot picture, so picture this instead: gathered into one solid block, every bar of it would form a cube roughly 1.8 m on each side — about the height of a person. Gold is so dense (19.32 grams per cubic centimetre, about two and a half times the density of iron) that Mexico's entire reserve, worth approximately $16 billion, would occupy only about 6 cubic meters.

Gold makes up 6.6% of Mexico's official reserves — a deliberately small gold share — Mexico keeps most of its reserves in dollars, euros and other currencies, holding bullion as a strategic minority. Measured against the world's monetary gold, that block is about 0.3% of all the bullion held by every central bank and treasury on the planet. Mexico sits in Latin America.

The metal is held at Banco de México — much held at the Bank of England. In recent years the holding has been held steady — neither bought nor sold in any size — a quiet vote of confidence in gold's role as a permanent reserve asset. Whether a reserve is growing or steady, its physical footprint barely changes: even doubling Mexico's gold would only widen the cube by about a quarter — the defining paradox of the metal is that staggering value keeps collapsing into a remarkably small space.

It is worth holding the comparison in mind. The largest reserve on Earth, the United States', is a cube only 7.5 m per side; all the gold ever mined in human history fits inside a cube about 22 m per side — the size of a seven-story building. Mexico's share of that 6,000-year inheritance is the block you see above.