etf-premium

See whether an ETF’s price gap is signal or noise.

ETF analysis

What it does

Calculates and explains ETF premiums or discounts, compares funds, screens outliers, and decomposes sudden moves into NAV and structural components.

When to use it

Use for ETF premium or discount questions, comparisons, screens, arbitrage analysis, or sudden divergences from holdings.

Give it an ETF premium, comparison, screening, arbitrage, or surge question; it returns the requested analysis and context.

This skill

Yahoo Finance

Read

Reads ETF data from Yahoo Finance

yfinance

Execute

Installs the yfinance package

pandas

Execute

Installs the pandas package

numpy

Execute

Installs the numpy package

Requires Python to check dependencies, install packages, and run the analysis code.

Requires yfinance; the skill installs it if missing.

Requires pandas; the dependency step installs it if missing.

Requires numpy; the dependency step installs it if missing.