Equity futures and international markets were little changed headed into the November CPI report. The STOXX 600 was unchanged, and overnight the Nikkei was also unchanged. The CPI report continued the narrative that inflation remains sticky, but it wasn’t any worse than expected. For both the headline and core readings, the m/m and y/y readings were right in line with expectations. At 3.3% y/y, though, core CPI remains too high for the Fed’s liking. The lack of any upside surprises, though, has provided a boost to pre-market futures, bond yields have pulled back slightly, and Bitcoin has gotten a bump higher. The fact that the numbers were right in line with expectations, though, all but locks in a rate cut at next week’s meeting.Remember when CPI reports were the only thing the market cared about?  Back in late 2022 and early 2023 right in the middle of the Fed’s rate hiking cycle, the monthly release of CPI was to economists and traders what a Taylor Swift concert was to teenage and twenty-something girls (and a lot of other people). It was an event, and the S&P 500 regularly rallied or declined 1% or more in reaction to the monthly “drop”. As shown in the chart below, in late 2022 and early 2023, the 12-month average daily change in the S&P 500 on the day of CPI reports was a gain or loss of just under 2%. Dating back to the turn of the century, the only other time that market reactions to CPI reports were more volatile was during the financial crisis, but that was a period when overall volatility was a lot higher too, so moves of more than 1% were the norm on any day during that period.As inflation data has become less ‘exciting’, the market’s infatuation with it has subsided. As shown in the chart below, the average daily change of the S&P 500 on CPI days has plummeted below the long-term average of 0.86% down to 0.71%.The S&P 500’s daily change on CPI days since the start of 2022 when the Fed’s last rate hiking cycle kicked off, shows the declining importance of CPI data on the market. Over the previous six months, there has only been one month where the S&P 500 moved 1% on a CPI Day, and following last month’s report, the S&P 500 finished the day unchanged rising by just 0.02% or 2 basis points (bps). That was the smallest daily move on a CPI Day since 2019 and was a far cry from two years earlier when the S&P 500 rallied 5.54% in reaction to the October 2022 report which was the largest upside move in reaction to a CPI report since 2008 and the third largest since 1999.One reason for the more muted reactions to recent CPI reports is that the data has become more behaved and less ‘exciting’. Whether that changes or not remains to be seen, but the recent stickiness of Core CPI relative to headline has economists speculating that there could be a second act.More By This Author:Small Business Facts Vs. Feelings Efficient Market?Opposite Day To Start The Week