In a surprising turn, the core Consumer Price Index (CPI) inflation remained stable at a modest 2.6% in December. This unexpected data has had a positive impact on S&P 500 futures and increased the likelihood of a Federal Reserve rate cut. The consistent inflation rate is being seen as 'Goldilocks' data, suggesting a balanced economic environment. This news update has stirred up interest in the possibility of a shift in Fed policy, with market participants eagerly watching for further developments.