Economic Calendar reveals crucial GDP and inflation data today, here’s what markets are watching before the Santa Claus Rally begins

The economic calendar reveals crucial GDP and inflation data today as markets eye the historic Santa Claus Rally boost. Tuesday morning brings a final revision of Q3 economic growth that could set the tone for year-end momentum. Investors are watching closely whether these economic fundamentals support the seasonal surge.

Economic Calendar Delivers Critical GDP Revision Today

The Bureau of Economic Analysis releases the final revision of Q3 2025 GDP this morning at 8:30 AM EST. Economists forecast growth of 3.2%, which would mark a slowdown from the robust 3.8% pace recorded in the second quarter. This data carries substantial weight for markets already positioning for year-end moves.

Despite the projected slowdown, current GDP growth remains resilient and well above recession-warning levels. The previous quarter delivered exceptional performance, positioning the economy for sustained expansion heading into 2026. Many analysts believe even 3.2% growth demonstrates strength worth celebrating.

PCE Inflation Report Signals Rate Cut Expectations

Yesterday’s Core PCE Price Index was closely monitored by the Federal Reserve’s inflation tracking. The Fed watches this metric more intently than CPI inflation for policy decisions. A reading at or below expectations strengthens the narrative for potential rate cuts in 2026.

Softer inflation readings have already sparked optimism about monetary policy shifting into a more accommodative stance. This scenario proves particularly bullish for technology stocks, growth companies, and high-valuation equities sensitive to interest rates. Markets have demonstrated resilience partly on expectations that rate hikes are behind us.

Market Catalysts Turn on Economic Data Quality

Economic Indicator	Expected	Previous
Q3 GDP Growth	3.2%	3.8% (Q2)
Durable Goods Orders	0.5%	0.5%
Consumer Confidence	91.7	88.7
Market Holiday Note	Early Close Wed	1:00 PM EST

Data quality becomes critical now that trading volume is predicted to be extremely thin ahead of the Christmas holiday. Thin volume amplifies price swings—sharp moves can happen without major news. Today’s economic releases provide the main catalyst for directional movement before the market’s early close on Wednesday and full closure on Thursday.

Consumer Confidence is also scheduled for release today at 10:00 AM EST, with expectations showing improvement to 91.7 from 88.7 previously. This uptick in sentiment could reinforce the foundation for the traditional year-end rally.

Santa Claus Rally Momentum Depends on Today’s Data Strength

The historic Santa Claus Rally phenomenon officially begins on Wednesday, December 24 and runs through the first two trading days of January. This seasonal pattern has generated average gains of 1.3% since 1950 over those seven trading days. Some years deliver even stronger performance—historically averaging 1.6% when considering data back to 1928.

Stock Trader’s Almanac research shows December itself boasts the highest success rate of any month, with the S&P 500 rising approximately 73% of the time. This seasonal tail wind, combined with positive economic data, creates powerful momentum. Yet low volume remains a double-edged sword—it can amplify gains or losses alike.

“Since 1950, the Santa Claus rally has seen the S&P 500 rise an average 1.3% over the last five trading days of the year and the first two in January.”

— Reuters, Wall Street Week Ahead Analysis

What Does Solid Economic Data Mean for Your Portfolio This Week?

If today’s GDP and inflation readings come in strong, expect the Santa Claus Rally to accelerate heading into Wednesday’s early close. Solid growth confirms the economy avoided recession, supporting equity valuations. Below-forecast inflation validates expectations for future rate cuts, benefiting growth and technology sectors significantly.

Conversely, weak data could trigger profit-taking before the holiday break closes out the year. The market’s current trajectory toward a strong 2025 finish remains fragile—dependent on these final crucial releases. Investors should prepare for volatility around 8:30 AM EST when the GDP report hits the wires and 10:00 AM EST when Consumer Confidence data arrives.

Sources

• Reuters – Wall Street economic calendar and Santa Claus Rally analysis
• Wall Street Journal – Q3 GDP expectations and economic growth coverage
• Investopedia – Santa Claus Effect historical research and performance data