Understanding Private Market Indices
Discover how private market indices work, why they matter for tracking the performance of private companies, and how Jarsy indices provide transparency to pre-IPO markets.
What Are Private Market Indices?
Just as the S&P 500 tracks the performance of 500 large public companies, private market indices track the performance of privately held companies. They aggregate data from multiple companies to provide a benchmark for the pre-IPO market.
Private market indices solve a fundamental problem: the private markets have historically been opaque. Without indices, investors had no standardized way to measure how private companies as a group were performing, or to compare returns across different sectors.
Why Private Market Indices Matter
1. Transparency in an Opaque Market
Unlike public markets where prices are updated every second, private company valuations only change during funding rounds or secondary transactions. Indices aggregate this data to provide a clearer picture of market trends.
2. Benchmarking Performance
If you invest in a private company, how do you know if your returns are good? Private market indices provide context. A 20% return might seem strong, but if the broader private market returned 40%, you underperformed.
3. Sector Analysis
Sector-specific indices like the Jarsy AI Index or Fintech Index allow investors to track performance within specific industries, identifying which sectors are outperforming or underperforming.
4. Investment Decision Making
Indices help investors identify trends, time their investments, and understand market cycles. They provide data-driven insights that were previously only available to large institutional investors.
Did you know? Companies are staying private longer than ever. In 1999, the median age of a company at IPO was 4 years. Today, it's over 11 years. This makes private market indices increasingly important for tracking company performance during this extended private phase.
How Jarsy Indices Are Constructed
Index Methodology
Jarsy indices follow rigorous methodologies designed to accurately represent their target markets:
- Valuation-weighted: Companies with higher valuations have greater influence on the index, reflecting their market importance
- Weight caps: No single company can exceed a certain percentage (typically 15-25%) to prevent over-concentration
- Eligibility criteria: Companies must meet valuation thresholds and have recent transaction data
- Regular rebalancing: Quarterly or semi-annual adjustments incorporate new data and maintain methodology compliance
Data Sources
Valuations are sourced from multiple channels:
- Primary funding rounds (Series A, B, C, etc.)
- Secondary market transactions
- Tender offers and employee stock sales
- Public disclosures and regulatory filings
Jarsy Index Family
Jarsy offers a suite of indices covering different segments of the private market:
- Jarsy Unicorn Index (JUI) — The broadest index, tracking the 25 largest private companies valued over $1 billion
- Jarsy AI Index (JAI) — Focused on leading AI and machine learning companies like OpenAI, Anthropic, and xAI
- Jarsy Space & Frontier Index (JSF) — Tracks space technology and defense companies including SpaceX and Anduril
- Jarsy Fintech Index (JFI) — Covers financial technology companies like Stripe, Revolut, and Plaid
- Jarsy Consumer Tech Index (JCT) — Tracks consumer-facing technology companies
- Jarsy Climate & Energy Index (JCE) — Focused on clean energy and sustainability companies
Using Indices for Investment Decisions
Private market indices can inform your investment strategy in several ways:
- Trend identification: Rising index values may indicate a healthy market for pre-IPO investments
- Sector rotation: Compare sector indices to identify which areas are gaining momentum
- Entry timing: Index drawdowns may present buying opportunities
- Portfolio construction: Use indices to ensure diversification across private market sectors
Frequently Asked Questions
What is a private market index?
A private market index tracks the performance of privately held companies, similar to how the S&P 500 tracks public companies. It provides a benchmark for measuring returns in the pre-IPO market.
How are private market indices calculated?
Private market indices use valuations from funding rounds, secondary market transactions, and other data sources. Jarsy indices are typically valuation-weighted with caps to prevent any single company from dominating the index.
Why do private market indices matter?
They provide transparency to an opaque market, help investors benchmark performance, enable comparison across sectors, and make it easier to track the overall health of the private company ecosystem.
How often are Jarsy indices updated?
Jarsy indices are rebalanced quarterly (some semi-annually), incorporating new valuation data, adding eligible companies, and adjusting weights based on the latest market information.