Whenever the Federal Reserve turns more hawkish and the cost of dollar funding soars, debate over whether Hong Kong should change its currency¡¯s peg resurfaces. The fixed exchange rate system has been around for more than four decades, with a narrow trading ban of 7.75 to 7.85 Hong Kong dollars introduced in 2005.

As the rate differential between the U.S. and China hits a record high, it¡¯s increasingly clear that this currency regime, which inevitably ties the city¡¯s lending rates to those of the U.S., is outdated and needs a revamp. The U.S. 10-year Treasury yield is flirting with 5%, while it¡¯s only a matter of time before China goes to sub-1%.

Because of the dollar peg, Hong Kong can no longer be Asia¡¯s go-to fundraising platform, eroding a key selling point for the financial center. For blue-chip companies, borrowing in the mainland has become a lot cheaper than in the city, where benchmark lending rates move in lockstep with the fed fund rate.