Talk of the K-shaped economy is brewing once again. The moniker first gained traction in 2020 to describe the divergence between how rich and poor Americans were experiencing the pandemic recovery. Now, with consumption increasingly concentrated in the top echelons of wage earners, economists are concerned that the US economy finds itself in a top-heavy, unstable state.Federal Reserve officials, who have been trying to navigate between supporting an economy where hiring has weakened and putting some pressure on demand to cool still-high inflation, discussed this bifurcation when they met in October. At the time, Fed Chair Jerome Powell said he was seeing evidence of the split. Growing frustrations around the cost of living reverberated through the most recent US elections on November 4, swaying a number of high-profile races toward Democrats. What is a K-shaped economy? A K-shaped economy is one where two groups experience increasingly different circumstances. While higher-income consumers, who are benefiting from stock-market and home-price gains, continue to spend, lower-income individuals are cutting back as inflation eats into their spending power and the job market tightens. Over the past year, the ranks of those at the bottom of the K have increased as more Americans struggle to stay afloat. Is the US in a K-shaped economy right now? The US has experienced rising inequality for decades, but the difference in spending patterns among consumers that has unfolded in the past year is raising concern among some economists that the current balance might ultimately lead to a downturn. Consumer spending, which drives two-thirds of US economic activity, is more concentrated among the wealthiest 10% of Americans than ever before. About half of all spending is fueled by those earners, and the top 20% account for almost two-thirds of all spending. The bottom 80%, which made up nearly 42% of spending before the pandemic, now accounts for just 37% of it, according to Moody’s Analytics. Why is the lower part of the ‘K’ getting larger? Lower- and middle-income Americans have seen their spending power diminish as inflation in everything from groceries to home prices continues to rise. At the same time, their wage increases are barely keeping up with rising prices and, for the first time in Bank of America Institute data going back to 2016, wage gains for higher-income households are outpacing those of their low- and middle-income counterparts this year. What are the economic implications? Because so much of the wealth accumulation of the past few years has been driven by a surging stock market, economists fear that even a moderate drop in stocks could drive a rapid pullback in spending by the top 20%. That could reverberate to the rest of the economy, where many Americans already feel financially stressed, and lead to a recession. How is it shaping the political debate? Inflation was already a major driver of the 2024 presidential election, and the broader concept of affordability this year catapulted candidates including New York City’s Zohran Mamdani to victory. Mamdani centered his mayoral campaign on the housing crisis and child care costs, helping the young, little-known state lawmaker, a democratic socialist, win office in a city synonymous with capitalism. In New Jersey, Mikie Sherrill won her bid for governor campaigning in part on curbing rising electricity prices. And Virginia elected Abigail Spanberger as governor on a platform centered around the rising cost of living. Is a K-shaped economy different from a Jenga tower economy? Economist Peter Atwater, who in 2020 popularized the idea of a K-shaped economy, said the current state of the US economy more resembles “a top-heavy Jenga tower,” a reference to the game of stacked wooden blocks where players attempt to remove one block at a time and place it at the top of the tower without collapsing the entire structure. What is the Federal Reserve’s role? Federal Reserve officials often say that their main policy tool, the setting of interest rates, is too blunt to address inequality. It’s something better left to elected officials, who can enact policies to specifically tackle the problems that contribute to the income gap.Some experts take issue with that point of view. Economist Claudia Sahm argues that interest rates actually do contribute to inequality and could therefore help unwind some of the bifurcation. She points to research showing that spending by low-income consumers nearly flatlined in 2022, when the Fed started aggressively raising rates to try to bring down inflation. Those rate hikes led to higher credit-card rates, which in turn hurt low-income consumers’ ability to spend disproportionately.