The Federal Reserve's mandate is to maintain price stability and maximum employment. When these key indicators show significant deviation, the Fed is compelled to take action. Statistical data shows that the US labor market has been relatively stable, with the unemployment rate hovering near the 5% full employment threshold for an extended period, exhibiting minimal volatility. In contrast, the inflation rate has been far more erratic. Influenced by international geopolitical events and domestic economic policies, US inflation data has frequently experienced sharp spikes and precipitous declines. Consequently, Federal Reserve monetary policy has often been adjusted in response to these inflation fluctuations.
In June 2022, the US Consumer Price Index (CPI) year-over-year rate surged to 9.1%, perilously close to the 10% mark, plunging the nation into a state of severe inflation. Just two years prior, in May 2020, the CPI stood at a mere 0.1%, teetering on the brink of deflation. This dramatic shift from economic chill to exuberant overheating within two years was primarily driven by the pandemic's impact and subsequent "revenge" spending. A core task for the Fed is to control inflation and ensure price stability. The extreme short-term volatility in CPI data severely tested the Fed's policy calibration acumen.
From 2022 to 2023, the Federal Reserve was under the leadership of Chair Jerome Powell, who was later widely criticized for being "significantly behind the curve" and owing "the American people an apology." The Fed did not initiate its first rate hike until March 2022, raising the benchmark rate to just 0.5%, a level that carried almost no restrictive force. That same month, the US CPI was at 8.5%, far exceeding the 2% target for moderate inflation. At the time, Powell argued that after a prolonged period of low inflation, some allowance for an overshoot was appropriate. However, an 8.5% inflation rate was clearly an excessive overshoot.
In reality, by March 2021, the US CPI had already breached the 2% level, reaching 2.6%. Even then, economists and business leaders were urging the Fed to guard against an inflation crisis and raise rates earlier. The Fed at that time disregarded these market voices, stubbornly maintaining an unchanged benchmark rate, thereby missing the optimal window to control rising prices.
The movement of the US Dollar Index has closely mirrored the performance of inflation data rather than the timing of the Fed's rate adjustments. In June 2021, with the US CPI at 5.4%—just crossing what was then considered the market's overshoot alert level of 5%—the Dollar Index began its ascent. It continued to rise until October 2022, peaking at 114.78 points. This represented a 27.7% gain from its level of 89.83 points in June 2021. By that time, US CPI data was already showing signs of retreat, and the Fed had implemented five rate hikes, bringing the interest rate to a clearly restrictive 3.25%.
In summary, US inflation bottomed and began rebounding first in May 2020. Subsequently, the US Dollar Index commenced its rally in June 2021. Finally, the Federal Reserve executed its initial rate hike in March 2022. This sequence reveals a clear transmission chain: inflation changes precede market movements, which in turn precede monetary policy adjustments. To capture the major phase of the Dollar Index's volatility, relying solely on the signal of the Fed's first rate hike is insufficient. It requires a forward-looking assessment of US macroeconomic trends based on data such as CPI and unemployment figures.
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