The US dollar soars, exchange rates fluctuate, and emerging market central banks are ready to "step in at any time."

After the Federal Reserve turned hawkish, emerging markets are feeling the pinch. Recently, the strong dollar has wreaked havoc on global markets, causing currencies in countries like Brazil, South Korea, and India to plummet to multi-year lows. The MSCI Emerging Markets Currency Index has fallen 3.3% since the end of September and is expected to face its largest quarterly decline in two years. The rapid depreciation of currencies may not only exacerbate imported inflation and have a huge impact on emerging markets but also increase the cost of repaying foreign debt. As a result, several central banks in emerging markets have begun to establish defenses and intervene: Eli Remolona, the Governor of the Central Bank of the Philippines, stated that the central bank is closely monitoring the decline of the peso and has strengthened its interventions in the foreign exchange market; South Korea will relax the upper limit of banks' foreign exchange forward positions by 50% to promote capital inflows; the Brazilian central bank has spent nearly $14 billion in the past week to support the real; and the Indonesian central bank has vowed to firmly defend the rupiah to enhance market confidence... Christopher Wong, a currency strategist at OCBC Bank in Singapore, said: "It is difficult to counter the strong dollar trend. In this environment, intervention can only slow the pace of currency depreciation, but even so, central banks may still have to adopt a mixed approach of verbal and actual intervention." However, the cost of fighting the strong dollar is that countries have to use their foreign exchange reserves to defend their currencies. Alan Lau, a foreign exchange strategist at Malayan Banking, stated: "The rise of the dollar is supported by the Federal Reserve, but liquidity in December is relatively thin, which may also lead to severe market fluctuations. During this period, central banks may continue to work to reduce the volatility of their currencies and prevent significant fluctuations." Brazil spends $14 billion to boost the real, but with little effect Wall Street Journal previously reported in detail that a crisis is spreading in Brazil—first, the exchange rate plummeted to a historic low, and then the decline began to spread to the stock market, local currency debt, dollar bonds, and other asset classes, with investors even starting to hedge against sovereign default risks. Amid panic, traders have adopted a "sell first, ask questions later" approach. To this end, the Brazilian central bank has intervened in the currency market almost daily over the past week, spending nearly $14 billion through direct operations or currency swap transactions to support the real, which is the worst-performing major currency this year. According to Bloomberg, just yesterday, the Brazilian central bank sold $8 billion in foreign exchange, the largest single-day dollar sale since Brazil adopted a floating exchange rate system in 1999. Additionally, the Brazilian central bank will conduct another credit auction of up to $4 billion on Friday and a spot auction of up to $3 billion. These interventions have indeed achieved some results, with the real rising 2.4% after Thursday's auction, leading the gains among emerging market currencies. Unfortunately, the effects of these interventions often dissipate within hours, as no matter how many dollars the central bank sells or how much more attractive local asset returns are, investors continue to pull out funds until they are convinced that Brazil's fiscal deficit will be contained Analysts point out that capital outflows can sometimes show volatility, but investors are very concerned about the situation in Brazil, which cannot be masked by a 15% bond yield. Daniela Da Costa-Bulthuis, an analyst at Robeco Asset Management, stated: "The government lacks credibility, and the stock market and real are beginning to reflect a complex economic situation that is difficult to resolve."