Retail vs. whales: Who actually drives the Santa rally？

Is the Santa Rally driven by retail FOMO or whale-sized capital flows？ Here‘s what actually fuels December’s market surge in stocks and crypto.

Key takeaways

Traditionally tied to the last five trading days of December and the first two of January, the Santa Rally now influences Bitcoin and major altcoins as seasonal optimism, low liquidity and renewed risk appetite shape year-end trading.

• With institutional desks quiet during the final week of December, even small retail trades can move prices. Social media narratives, year-end bonuses and FOMO often amplify that effect.
• Retail traders chase narratives, quick trends and speculative opportunities, while whales focus on risk management, balance-sheet adjustments and optimizing capital ahead of the new year.
• The slowdown in institutional activity increases price sensitivity, making retail-driven surges in Bitcoin, tech stocks and speculative tokens appear more powerful than they actually are.

The Santa Claus rally, which covers the last trading days of December and the first few days of January, has interested market experts for years. The trend has now spread to cryptocurrencies. This period of end-of-year optimism, low trading volume and increased risk appetite can push prices sharply higher.

What leads to this phenomenon: individual traders or large investors？ In the current market, which includes drivers like exchange-traded funds (ETFs), institutional flows and online traders, understanding the dynamics behind the Santa Rally becomes even more important.

This article explains what the Santa Rally is and how holiday periods influence investor behavior among both retail and institutional participants. It explores when each group tends to dominate trading and how to read the indicators that shape the rally.

What is the Santa Rally？

Traditionally, the Santa Rally refers to the last five trading days of December and the first two trading days of January, a period that has often produced strong gains in US stocks. The Standard & Poors 500 (S&P 500) has posted increases during this window in most years since the 1950s.

This pattern is no longer limited to stocks. Major cryptocurrencies also tend to perform well in late December, supported by renewed investor interest, reduced activity from large institutions and new funds entering the market at the start of the year.

Solana (SOL), for instance, traded at $56 on Dec. 24, 2023, and rallied to $105 by Jan. 5, 2024. Gold often benefits from similar seasonal trends in late December as investors adjust portfolios and increase demand for safe assets.

Who are the main participants in a Santa Rally？

The Santa Rally is driven by a mix of market forces and investor psychology. Here are the key groups whose actions contribute to the positive momentum.

• Retail investors:Retail investors are individuals who trade via brokerage accounts, cryptocurrency apps and mobile platforms. They typically make smaller trades, react to market stories and respond quickly to social media trends.
• Whales and institutions:Whales include major cryptocurrency holders, spot ETFs, hedge funds, pension funds, companies and market makers. These participants trade in large amounts, follow set rules and operate with structured plans. They adjust portfolios at year-end, manage risk levels and often use derivatives to protect or increase their positions.

The objectives of these groups differ significantly:

• Retail traders focus on price trends, narratives and fear of missing out (FOMO).
• Whales focus on year-end reporting, risk controls and efficient use of capital.

Did you know？ Crypto never sleeps. Unlike stock markets that close on weekends and public holidays, Bitcoin trades nonstop worldwide. This round-the-clock activity creates unique patterns like “weekend volatility,” where prices can move more sharply because institutional trading desks are offline.

How holiday inactivity amplifies small investor impact

Retail traders are often seen as sparking year-end rallies because the last week of December typically has less activity from major institutions. With many professional desks quieter during the holidays, even small amounts of retail buying can move prices more than usual.

Why the holidays favor retail participation

There are several reasons for increased retail participation during the holidays:

• Lower activity from institutions allows retail trades to have a greater impact.
• Optimism for the new year encourages more risk-taking and new deposits on trading platforms.
• Narratives like “Santa Rally,” “December increase” and the “January effect” spread quickly on social media.
• End-of-year bonuses and savings often lead to retail purchases.

Retail-preferred strategies in this period

Retail traders often shift to:

• High-risk technology stocks
• Options trades with leverage
• Bitcoin (BTC) and major alternative coins
• Smaller tokens that tend to react quickly to market sentiment.

Since retail traders often follow rising prices, these investments can grow quickly. This can create the impression of a coordinated rally even when the moves are mostly emotional and short-term in nature.

Did you know？On platforms such as X, Reddit and Telegram, a single viral post can move a tokens price before official news outlets catch up. This speed of narrative-driven trading has contributed to the rise of memecoins, social trading and so-called attention markets.

Institutional whales and the year-end crypto surge

Although retail may start a rally, whales often determine its size.

Growth of institutional investments has increased greatly

Since spot Bitcoin ETFs launched, institutional investments have become a major force in cryptocurrency markets. Large ETF purchases of Bitcoin can lift the broader market. When pension funds and institutional managers add riskier assets in late December or early January, the resulting inflows often create wider and longer-lasting rallies.

Year-end rebalancing

Whales follow organized steps:

• Pension funds and asset managers adjust portfolios to meet target levels.
• Hedge funds change risk levels and close short positions before the new year.
• Institutions with strong performance may increase risk to prepare for January activity.

These adjustments can produce large buy orders that significantly affect markets during low-volume periods.

Derivatives and advanced trading

Whales also influence derivatives markets, including futures, options and perpetual contracts. A single hedge fund adjusting or protecting a position can shift funding rates, trigger short squeezes or set off chain reactions in holiday markets. These moves can sometimes look like retail-driven excitement even when they originate from institutional risk management strategies.

When retail leads and when whales dominate

Both groups influence the Santa Rally, but their impact shifts depending on market conditions.

Scenario 1: Retail-led Santa Rally

Retail tends to dominate when:

• Market mood is positive
• Social media attention rises
• Institutional trading decreases.

These situations often create fast, unstable price movements. They are most visible in memecoins, small-cap stocks and higher-risk assets.

Scenario 2: Whale-led Santa Rally

Whales tend to lead when:

• ETF investments increase
• Hedge funds expect policy changes, such as rate cuts
• Institutions make major portfolio adjustments
• Derivatives funding improves.

This usually results in steadier, broader rallies and stronger gains in Bitcoin, Ether (ETH) and large alternative coins.

Scenario 3: Combined regime (the most common today)

In current markets, the typical pattern is combined:

• Retail creates the story and initial momentum.
• Usually, whales provide the capital to maintain or expand the rally.

Recognizing this interaction is essential for forecasting December performance.

Did you know？ Futures, perpetual swaps and options now dominate global crypto trading volumes. Perpetual futures in particular have no expiry date, making them a favorite among sophisticated traders. Funding rates from these markets often serve as early indicators of trend strength or potential reversals.

How to read the 2025 Santa Rally indicators in real time

As the 2025 Santa Rally unfolds, you need to track specific indicators and data points to gauge its strength and sustainability.

Retail indicators to watch

• Search trends for cryptocurrencies and meme assets
• Social media activity and tone
• Deposit patterns from small accounts on exchanges
• Increase in trading application downloads
• Onchain activity from small wallets.

Whale indicators to watch

• Net inflows to Bitcoin ETFs
• Onchain accumulation by large holders
• Options open interest and positioning bias
• Perpetual contract funding rates
• Hedge fund position reports.

Macro signals

• December inflation reports
• US Federal Reserve statements
• Volatility indexes such as the CBOE volatility index (VIX) and the Bitcoin volatility index (BVIX)
• Global fund flows.

Together, these indicators provide a clearer view of which group is guiding the markets.

Risk control: Dont let the Santa Rally wreck your investments

Holiday markets often experience low volume, heightened emotions and sudden reversals. These conditions can make price movements unpredictable, so understanding the risks is important for anyone observing the market.

Common considerations during this period include:

• Being aware that lower liquidity can exaggerate price swings
• Recognizing that sentiment-driven moves may not last
• Understanding that leverage, if used, can increase both gains and losses
• Keeping in mind that seasonal rallies can end abruptly
• Noting when momentum appears to cool or stabilize.

The Santa Rally can be an interesting seasonal pattern, but it is not guaranteed. Relying solely on historical behavior without considering current market conditions can lead to misunderstandings about potential outcomes.