Inflation Watch - May 2018


By Steven Weisbart, Chief Economist

The Insurance Information Institute (I.I.I.) Inflation Watch spreadsheet contains the latest consumer price data from the U.S. Department of Labor Bureau of Labor Statistics (BLS). The CPI-U—the popular measure of consumer prices, sometimes called headline inflation—rose by 2.8 percent in May 2018 vs. May 2017, which is the largest 12-month increase since the period that ended on February 2012. The core CPI—the overall index minus the effects of price changes for food and energy—rose 2.2 percent for the 12 months ending May 2018—the highest 12-month increase since the period ending February 2017. (Most economists prefer to use the core, not the headline, inflation measure to avoid the “noise” of volatile prices for those items.) The core PCE deflator—the inflation measure that the Federal Reserve prefers—rose by 1.8 percent on a year-over-year basis in April 2018 (the latest available reading). Many forecasters project headline CPI for 2018 to range between 2.2 and 2.9 percent.

Price trends for items that more directly affect property/casualty (P/C) insurance claims do not necessarily follow broad-based price indexes. Prices for items such as intensive healthcare affect claims under third-party coverages such as workers compensation and bodily injury liability, as well as first-party coverages like Personal Injury Protection (PIP), med pay and obviously, medical expense insurance. For many years these price increases have outpaced headline and core inflation, and this is still true today. In May 2018, seasonally adjusted on a year-over-year basis, prices for inpatient and outpatient hospital care rose by 4.3 percent. Price increases for prescription drugs had been moderate until May 2018, when it rose 3.7 percent from May 2017; the year-over-year increase had been below 3 percent since July 2017. The spike was due to an unusual 1.4 percent increase in May 2018 over April 2018; a jump in prescription drugs that high had not happened since September 2016.

Price increases relating to auto insurance property claims have been quite moderate recently. Prices for motor vehicle parts and equipment, which affect not only comprehensive and collision claims, but property damage liability as well, rose by 0.2 percent in May 2018 vs. May 2017. Parts-and-equipment prices have been flat or falling consistently since 2012 and are now about the level reached in May 2011. Prices for motor vehicle repair were flat for the 12 months ended May 2018. Prices for motor vehicle body work rose by 2.5 percent year-over-year (not seasonally adjusted). The BLS survey of consumer prices for motor vehicle insurance in May 2018 rose by 8.3 percent year-over-year. Of course, many factors other than prices for auto repair likely are affecting these increases. These include: the continuing drop in insurers’ investment income; continuing above-CPI growth in the prices for intensive medical care; and an unusual upturn in the collision rate, which is related to increased distracted driving and the increase in the number of people employed (and adding cars to rush hour).

The Census Bureau computes a price index for new single-family houses under construction. The latest data (for April 2018) shows a 3.8 percent increase over the index in April 2017. However, the National Association of Home Builders, which tracks the price of framing lumber, reported that in April their index climbed from $400 to $500, and for the month of May was at $559 (+34.4 percent for May 2018 vs. May 2017), an all-time high.

Media stories about inflation are partly traced to belief that, since the economy is nearing (or at?) full employment, employers will have to hike wages further in order to attract needed workers, and that wage increases will morph into consumer price increases. And wages have been rising. The Bureau of Labor Statistics reported that on a year-over-year basis, average weekly earnings of private sector employees grew by 3.0 percent in May 2018 over the prior May, but these economy-wide numbers obscure variations in particular industries. For example, average weekly earnings in May 2018 vs. May 2017 rose by 4.3 percent in the construction industry, but only by 1.7 percent in manufacturing. On the services side, average weekly earnings rose by 5.8 percent in the financial activities industry, but only 3.0 percent in the education and health services industry. Wage growth affects workers compensation and, indirectly, liability and PIP claims. Wage growth above inflation means consumers have increased buying power, which could lead to stronger economic growth near-term.

One additional price bears watching: the price of money (interest rates). The Federal Reserve’s Open Market Committee is likely to continue through 2018 to raise the short-term “fed funds” rate, which often drives interest rates for longer-term loans. Long-term interest rates will likely also rise because of substantial additional borrowing by the federal government, both because of the recently-enacted federal income tax changes and the subsequent budget agreement. But even before the tax act and budget agreement, interest rates were rising. The yield on 10-year U.S. Treasury notes in May 2018 was 3.0 percent, up from 2.3 percent a year earlier. Higher long-term interest rates can be expected to have a dampening effect on economic growth, but this could be offset by the short-term enhancing effects of more money in consumer and business pockets from the income-tax cuts. Higher interest rates will help P/C insurer investment, income but could weigh on the capital gains element of investment gains, as the prices of currently-held low-yielding bonds fall.


Please click on the file name below to view the article in PDF format. You will need Adobe Acrobat Reader to view the file.

You can download Adobe Acrobat Reader, free of charge, from the Adobe website (

Note: Printer fonts may vary by browser and version of Adobe Reader.

Back to top