How a shock to US interest rates becomes a shock to Asia
Countries that tie their currency to the dollar turn losses on US government bonds into higher local borrowing costs and limits on moving money, and both of Asia's big dollar links are near their limits at once.
Hong Kong, which fixes its currency to the US dollar, is running low on the cash cushion it uses to defend that fix. The pool of cash its banks hold with the city's monetary authority, called the aggregate balance, has fallen to HK$54bn, about $6.9bn, a level crossed only once before, in 2023, during an earlier stretch of currency defense, according to a Bloomberg analysis of data from the Hong Kong Monetary Authority, the HKMA, which plays the role of the city's central bank. On Wednesday the Hong Kong dollar traded a hair from the weakest point the fix allows (within 17 pips, tiny fractions of a cent, of 7.85 to the US dollar). This is what the US bond selloff looks like when it lands somewhere else.
The plumbing is simple and unforgiving. Higher interest rates on US government bonds make traders prefer US dollars; to hold the fix the HKMA buys Hong Kong dollars; every purchase drains cash from the banking system. With HK$54bn left, even modest interventions can send the rate Hong Kong's banks charge each other, Hibor, jumping, and that rate feeds straight into mortgages. DBS's Carie Li sees the trend in local rates as "set to be upward" and "volatile" if the balance hits its previous lows. The HKMA has already told the public to manage interest-rate risk on property purchases and borrowing. The alternative, the HKMA putting cash back in by not rolling over the short-term bills it has sold, which OCBC expects if the drain gets too fast, would, in Bloomberg's words, be "counterproductive" to the intervention it is meant to support.
India is fighting the same shock with different weapons and more of them. Even after raising $133bn through a deposit scheme aimed at Indians abroad and lifting interest rates for the first time in nearly four years, the rupee slid toward 97 per dollar, with analysts eyeing 100. The Reserve Bank of India, the country's central bank, has moved its response out of the markets and into the economy: state-owned oil refiners, who need about $10bn a month for crude, are being taken out of the currency market altogether, and it has been made more expensive for everyone else to lock in a dollar price in advance. Importers' advance purchases of dollars are running at a record $64bn a month, up 44% on last year, Bloomberg reports. Governor Malhotra calls the market "unduly pessimistic". That bought a 0.5% rally on Tuesday.
Two mechanisms, one source. A 5.32% borrowing rate for the US government is a Hong Kong mortgage rate and an Indian import bill. Neither is a spark on its own; both are the pile getting bigger in places far from where the fire started.