The league table of foreign exchange reserves mostly reads as expected. China holds roughly $3.24 trillion, more than the next three countries combined. Japan is second at about $1.23 trillion. Then India, Saudi Arabia, Hong Kong, South Korea and Singapore — trade-heavy economies that accumulate foreign currency by selling more than they buy.
Third place is the odd one. Switzerland holds around $870 billion, which is remarkable for a country of nine million people. It has more reserves than India, a nation with over 150 times its population.
Reserves normally accumulate as a by-product
For most countries reserves are a side effect. Exporters earn dollars, sell them to the central bank for local currency, and the central bank ends up holding the dollars. Run a trade surplus for long enough and reserves pile up on their own. That is essentially the Chinese, Japanese and Korean story.
Countries also hold reserves deliberately, as insurance. If your economy depends on imported food, fuel or medicine, a foreign currency buffer is what stands between a bad year and an emergency. This is why import-dependent economies often hold far more than their trade volumes alone would justify.
Switzerland bought its reserves on purpose
The Swiss case is different. During the eurozone crisis, investors moving money out of the euro bought francs, and the franc rose sharply. For an economy where exports are a large share of output, that appreciation was a serious problem — Swiss goods were being priced out of their main market.
The Swiss National Bank responded by creating francs and using them to buy foreign assets, holding the exchange rate down. The reserves are the accumulated residue of that intervention. They are not a buffer built from surpluses; they are the balance sheet consequence of a deliberate currency policy.
This produced an unusual situation: a national central bank became one of the world's larger holders of foreign equities, including substantial positions in major US technology companies. The SNB owns those shares as a by-product of exchange rate management, not as an investment thesis.
Hong Kong's position is also structural
Hong Kong at roughly $420 billion is large for a territory of under eight million people, and for a related reason. The Hong Kong dollar is pegged to the US dollar within a narrow band, and defending a peg requires holding enough foreign currency to buy back your own on demand. The reserves are the credibility of the peg made concrete.
What the ranking does not show
Reserve totals say nothing about whether a level is adequate, and adequacy is what actually matters. The usual rules of thumb compare reserves to months of imports or to short-term external debt. By those measures a country well down this list can be comfortably covered while a country higher up is stretched.
The figures also move with valuation as much as with flows. Reserves are held in several currencies and in gold; when the dollar strengthens against the euro and yen, the dollar-denominated total falls even if nothing was bought or sold. Comparing one year to the next without accounting for that is a common way to misread the trend.