Why a Santa Claus rally could happen, Trump announces deals to reduce prescription drug prices

Market Domination Overtime - December 22, 2025 - Summary

Key Concepts:

• Santa Claus Rally: A historical tendency for stock market gains during the last five trading days of the year and the first two of the new year.
• AGI (Artificial General Intelligence): Hypothetical AI with human-level cognitive abilities.
• SLIM (Small Language Models): Smaller, more focused AI models designed for specific tasks.
• Basis Points: A unit of measurement used in finance to describe the percentage change in an interest rate (1 basis point = 0.01%).
• Capex: Capital Expenditure - funds used by a company to acquire, upgrade, and maintain physical assets such as property, plants, buildings, technology, or equipment.
• JGBs: Japanese Government Bonds.

Market Overview & Performance (December 22, 2025)

The major stock averages closed higher on December 22, 2025. The Dow Jones Industrial Average rose 0.4%, the Nasdaq Composite increased 1.3%, and the S&P 500 gained 0.9%. Over the past five trading days, the S&P 500 and Nasdaq have eked out gains (approximately 0.5%), while the Dow has experienced a weekly decline.

Sector Performance:

Technology led sector gains, followed by Industrials and Healthcare. A deal announced with President Trump to lower prescription drug costs boosted Healthcare stocks, with nine companies involved.

Notable Stock Movements:

• Nvidia: Up 4% for the day and over 3% for the week, despite a volatile week.
• Meta: Higher for the day and week.
• Tesla & Microsoft: Also higher for the day.
• Apple & Alphabet: Slightly lower for the week.
• Broadcom: Down 5%.
• Micron: Up 10% following strong earnings, lifting the semiconductor sector.

Cryptocurrency Market:

Bitcoin held above $87,000 per token, showing a tight trading range but an increase over the last 24 hours. Ethereum (ETH) rose over 5%, and crypto-related stocks also saw a bump. However, the crypto space remains volatile overall.

Economic Data & Outlook

The final full week of trading for 2025 concluded on an upbeat note, with expectations of a potential “Santa Claus Rally.”

Santa Claus Rally Discussion:

Michael Arone, Chief Investment Strategist at State Street Investment Management, discussed the historical “Santa Claus Rally” (the last five trading days of the year plus the first two of the new year). He believes the market has cleared obstacles with tolerable employment and inflation reports, creating favorable conditions for a rally. He anticipates a continuation of gains, citing a positive environment for risk-taking and the potential for a third consecutive year of above-average gains. Jeff Hirsch, of the Stock Trader’s Almanac, was referenced as the originator of identifying the Santa Claus Rally in 1972.

2026 Market Outlook – “Uncomfortably Bullish”

Arone described his outlook for 2026 as “uncomfortably bullish.” He highlighted the importance of monitoring long-term interest rates, noting the unusual situation of rising 10-year Treasury yields despite Federal Reserve rate cuts (1.75% or 175 basis points cut during the cycle). He believes higher interest rates could pose a risk to the bull market if they accelerate beyond a manageable range. Japanese 10-year JGBs are now above 2% and German bonds are approaching 3%.

Sector Rotation & AI Trade:

Arone anticipates a rotation out of technology into other sectors, particularly small-cap stocks, which trade at lower multiples despite similar earnings growth potential. He remains positive on technology due to strong fundamentals (return on invested capital, free cash flow margins, earnings growth) and continued AI adoption. He noted that the talk of a bubble suggests there isn't one.

Small-Cap Stocks:

Small-cap stocks have underperformed large-cap stocks for nine consecutive calendar years. However, Arone believes small caps have a fighting chance in 2026 due to expected higher earnings growth, lower interest rates, the end of quantitative tightening, expansion of the Fed’s balance sheet, and the impact of the “one big beautiful bill” (likely referring to recent fiscal stimulus). Small-cap earnings growth outpaced large-cap growth in the third quarter of 2025 – the first time in 13 earning seasons.

AI Predictions for 2026 (Matt Kulkins, CEO of Appion):

1. Regulatory Battle: A clash between the federal government and states over AI regulation, with potential constitutional challenges and conflicts between US and European regulators.
2. Industrial-Level Value: AI will begin to deliver significant value within large organizations by being integrated into complex processes.
3. Purpose-Specific Models (SLIM): Focus will shift from AGI to smaller, specialized AI models (SLIM) offering practical solutions.
4. Scale Fueled by Resources: Continued investment in AGI scale, driven by power, data, and processing capabilities.
5. Brand & Distribution: AI winners will be those with strong brands and established distribution channels, potentially challenging the dominance of companies like OpenAI.

Kulkins believes the focus should shift from creating human-level AI (AGI) to building AI that excels at specific tasks. He predicts a democratization of the AI market, with more specialized vendors emerging.

Economic Calendar (Upcoming Week):

• Tuesday: Third Quarter GDP (forecast 3.2%), Consumer Confidence (expected 91.7).
• Market Closure: Early closing on December 24th, closed on December 25th. Reopen December 26th with normal hours.

Pharmaceutical Pricing:

President Trump announced deals with nine additional drug makers to lower pharmaceutical prices, offering a three-year tariff grace period in exchange for increased US manufacturing investment. Companies involved include GSK, Amgen, Merck, Novartis, Sanofi, and Bristol Myers Squib. Bristol Myers Squib will offer its blood thinner Equilis to Medicaid for free. This brings the total number of companies involved to 14.

Housing Market Update (Claire Boston, Yahoo Finance):

Existing home sales increased for the third consecutive month, but the gain was small (0.5%) to a seasonally adjusted annual rate of 4.13 million – still well below pre-pandemic levels. Lower mortgage rates are bringing buyers back into the market. 2025 is on track to be a 30-year low for home sales.

Housing Affordability Outlook (2026):

Mortgage rates are expected to be in the low 6% range in 2026. Home price appreciation is expected to slow to 1-3%. Wage growth is currently around 3%, potentially allowing wages to catch up with home prices. Regional differences exist, with softer markets in the Southeast (due to increased building) and stronger markets in the Northeast (due to limited supply).

Conclusion:

The market is currently exhibiting positive momentum, fueled by favorable economic data and anticipation of a Santa Claus Rally. While optimism prevails, experts caution about potential risks, particularly rising interest rates. The AI landscape is evolving, with a shift towards practical applications and specialized models. The housing market shows signs of stabilization, but affordability remains a challenge. Investors should remain vigilant and consider a diversified approach, recognizing the potential for sector rotation and the importance of monitoring key economic indicators.