Index Fund Active Choice Workbench Institutional Quant

Benchmark Presets

Weighting Architecture

Macro & Dispersion Stress Test

Under mega-cap dispersion, top constituents grow their market share aggressively, masking broad-market breadth decay while tracking error relative to equal-weight surges.
TOP 5 CONCENTRATION
28.4%
5 of 500 stocks
HERFINDAHL INDEX (HHI)
174.2
Concentration metric
EFFECTIVE N STOCKS
57.4
1 / ∑(w²) breadth
ANNUALIZED DRAG (BPS)
14.2 bps
Rebalance + frontrunning
⚠️ Concentration Warning: Over 28% of fund capital is allocated across just 5 mega-cap companies. The effective constituent breadth (57.4 stocks) is 88.5% lower than nominal headline constituent count (500).

Constituent Weight Curve (Top 50)

Market-Cap Weighted

Lorenz Concentration Curve

Entropy: 0.68

Sector Exposure & Active Tilts

Top 10 Holdings Decomposition & Front-Running Exposure

Rank Ticker / Name Sector Index Weight Rebal Turnover Liquidity Slippage Factor Tilt

The Economist Economic Architecture Thesis

"Passive" index funds are not neutral reflections of the economic landscape; they are governed by rigid algorithmic rules. Every decision—whether to weight by market capitalization, when to rebalance, and how to define inclusion criteria—is an active structural trade-off between momentum exposure, liquidity slippage, and concentration vulnerability.

Strategy: Market-Cap Weighted (Top Heavy)
Drawdown Resilience: Moderate (High Single-Sector Vulnerability)
Turnover Pct: 4.8%
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