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Liquidity Sizing

4. Liquidity & Dollar-Volume Scenario Segregation

Partitioning the equity universe into seven liquidity tranches to model market impact, slippage, and institutional capacity.

Target Audience: Portfolio Managers, Execution Desks & Risk Officers

Key Takeaways for Investors & Traders

Liquidity-Aware Selection

Separates micro-cap anomalies from institutional-capacity large-cap trade candidates.

30-Day ADV Filtering

Computes rolling 30-day average dollar volume to eliminate temporary volume spikes.

Seven Capital Tranches

Defines discrete tranches ranging from USD 10M-25M (Group A) to > USD 1.0B (Group G).

Execution Capacity Sizing

Allows managers to deploy capital in alignment with actual market absorption constraints.

Executive Summary

To prevent liquidity illusions where high theoretical backtest returns cannot be executed in live trading, the pipeline partitions the US equity universe into seven distinct 30-day Average Dollar Volume (ADV) tranches (Tranches A through G). This structure ensures that reported candidates match specific capital deployment scales.

1

Financial Logic: Market Impact, Slippage, and Capacity

A fundamental challenge in quantitative equity screening is that smaller, less liquid stocks often exhibit extreme statistical anomalies that disappear once transaction costs and bid-ask spreads are accounted for.

By segregating the universe into discrete dollar-volume tranches:

  • Small-Cap Strategies can harvest high-beta momentum and mean-reversion anomalies in Tranches A and B while accounting for wider spreads.
  • Institutional Scale Strategies can restrict execution to Tranches E, F, and G, ensuring that multi-million-dollar orders do not generate adverse price impact.
2

Dollar-Volume Tranche Taxonomy (Tranches A through G)

Liquidity is quantified via 30-Day Average Dollar Volume ($\text{ADV}_{30}$):

$$\text{ADV}_{30, i}(t) = \frac{1}{30} \sum_{k=0}^{29} (P_{i, t-k} \cdot V_{i, t-k})$$

Liquidity Group 30-Day Dollar Volume Bounds Market Capitalization Tier Capacity Profile & Execution Strategy
Group A USD 10M $\le \text{ADV} <$ USD 25M Micro / Small-Cap Equities High idiosyncratic alpha, higher bid-ask spread drag. Limit orders required.
Group B USD 25M $\le \text{ADV} <$ USD 50M Small-Cap Equities Active retail and boutique institutional participation.
Group C USD 50M $\le \text{ADV} <$ USD 100M Small / Mid-Cap Equities Balanced liquidity and volatility dispersion.
Group D USD 100M $\le \text{ADV} <$ USD 250M Mid-Cap Equities Core institutional liquidity; moderate capacity.
Group E USD 250M $\le \text{ADV} <$ USD 500M Upper Mid-Cap Equities Substantial institutional participation; low market impact.
Group F USD 500M $\le \text{ADV} <$ USD 1.0B Large-Cap Equities Broad institutional holdings; minimal execution friction.
Group G $\text{ADV} \ge$ USD 1.0B Mega-Cap Equities Deepest global liquidity; suitable for sovereign wealth and macro funds.