Methodology

How PortfolioSight looks through a portfolio.

PortfolioSight combines your direct positions with reported fund holdings, scales each underlying position by your portfolio weight, and consolidates duplicate exposures into one economic view.

1. Portfolio inputTickers and portfolio weights entered manually or by CSV.

2. Fund look-throughFund holdings are matched to SEC N-PORT filings and mapped to securities.

3. Exposure aggregationUnderlying holdings are multiplied by fund weights and combined with direct positions.

4. Benchmark comparisonPortfolio exposures are compared with a selected benchmark to calculate active weights.

Primary holdings source

PortfolioSight primarily uses Form N-PORT data filed with the U.S. Securities and Exchange Commission. Registered investment companies use N-PORT to report portfolio holdings and related information. The database is processed into a local analytical dataset so portfolio analysis does not require a live SEC request for every user query.

Important: N-PORT data is regulatory filing data, not a real-time holdings feed. A fund's current holdings may differ from its most recently available report.

Portfolio look-through calculation

For each fund position, PortfolioSight takes the fund's reported weight in an underlying security and multiplies it by the fund's weight in the user's portfolio.

portfolio exposure = fund portfolio weight × underlying fund weight

If the same security appears in more than one fund—or is also held directly—the contributions are added together. This is why a portfolio containing multiple broad-market funds can have substantially more exposure to a company than any single position suggests.

Security matching and classification

Reported positions are matched using available identifiers such as ISIN, CUSIP, ticker, issuer information, and internal security-master mappings. PortfolioSight then uses the best available classification for attributes such as sector, country, asset category, and issuer type.

Not every security can be perfectly classified. Unresolved or ambiguous positions may appear as unclassified rather than being forced into a category.

Portfolio weight

Your consolidated economic exposure

Includes direct holdings plus indirect exposure through funds.

Benchmark weight

Look-through exposure of the selected benchmark

The benchmark is treated as a 100% position in the chosen fund or index proxy.

Active weight and Active Share

Active weight is the portfolio's consolidated weight in a security or category minus the corresponding benchmark weight.

active weight = portfolio weight − benchmark weight

Active Share summarizes how different the portfolio is from the benchmark across individual security weights:

Active Share = ½ × Σ |portfolio weight − benchmark weight|

These measures describe portfolio differences; they do not predict future performance.

Fixed income and other assets

When available in the filing, PortfolioSight can retain fields such as asset category, issuer type, maturity date, coupon type, annualized rate, default indicators, and convertible-security indicators. Coverage varies by filing and security type.

Known limitations

Regulatory holdings are reported with a lag and may not represent current positions.
Security identifiers and classifications can be missing, stale, or ambiguous.
Derivatives and complex instruments may not translate cleanly into simple equity-equivalent exposure.
Cash, accrued items, short positions, and other fund-level items can cause reported holdings weights not to sum to exactly 100%.
Benchmark comparisons depend on the selected benchmark and its available holdings report.
Beta calculations and classifications may change as the data pipeline is improved.