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The Trimmed Mean CPI, which removes price extremes, is criticized for being unhelpful in the current environment. By design, it cuts out the very supply shocks (e.g., energy, food prices) that are the primary drivers of inflation, leaving a distorted picture dominated by housing.

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Inaccurate headline statistics are not just academic; they actively shape policy. The misleading Consumer Price Index (CPI), for example, is used to determine Social Security benefits, food assistance eligibility, and state-level minimum wages. This means policy decisions are based on a distorted view of economic reality, leading to ineffective outcomes.

After accounting for measurement quirks in both CPI and PCE, the podcast's economists converge on an estimate for "true" underlying inflation around 2.7-2.8%. This consensus view suggests that while official measures are noisy, the underlying trend is still meaningfully above the Fed's 2% target.

The gap between Core PCE (3.3%) and Core CPI (2.5%) inflation is driven by how each index weighs shelter and measures financial services. CPI gives more weight to disinflating shelter, while PCE is inflated by a stock market-linked measure for financial services.

Kevin Warsh advocates for the Dallas Trimmed Mean inflation metric, which excludes extreme price moves. However, this gauge can be misleading. A single significant shock, like oil prices, initially gets excluded but its effects gradually bleed into many other items, causing the metric to lag behind true underlying inflation.

The CPI averages costs across 80,000 items, many of which are non-essentials or luxury goods. This method masks the true, higher inflation rate on basic necessities. For example, while the CPI showed a 72% cost increase over two decades, the actual cost of essentials like housing, food, and healthcare rose by a much larger 97%.

Despite official CPI averaging under 2% from 2010-2020, the actual cost of major assets like homes and stocks exploded. This disconnect shows that government inflation data fails to reflect the reality of eroding purchasing power, which is a key driver of public frustration.

A measure of "market-based core PCE services ex-housing" inflation is accelerating. This niche metric, which strips out imputed prices and volatile sectors, suggests that core economic activity is generating persistent inflation, challenging narratives focused solely on energy shocks or trade wars.

Official year-over-year CPI figures are misleading due to a government shutdown's data collection issues. By using an annualized three-month moving average to capture current momentum, analysts find that both core and headline inflation are actually running at a 3% rate, suggesting underlying price pressures are stronger than reported.

"SuperCore" inflation, which measures services excluding energy and shelter, is a key metric for gauging underlying price pressures tied to the labor market. Currently at 2.8% year-over-year, its moderation is seen as a positive sign that inflation is heading in the right direction.

The new Fed Chair's suggestion to use measures like the trimmed-mean CPI isn't new. These same metrics were used by Fed governors in 2021 to justify delaying rate hikes. They failed to capture the breadth of rising inflation then, which suggests caution should be used before elevating them as primary policy guides now.

Trimmed Mean CPI Misleadingly Excludes the Actual Sources of Current Inflation | RiffOn