Which market indices are supported for component analysis?

The skill currently supports the Nasdaq 100, S&P 100, Dow Jones 30, and the Philadelphia Semiconductor Index (SOX).

How is the 'Base Date' determined for returns?

The base date is the last trading day of the year prior to your start year (e.g., 2023-12-29 for a 2024 analysis) to capture the true return from the start of the period.

What data source does this skill use?

It fetches real-time and historical price data from Yahoo Finance via the yfinance library, featuring built-in caching to improve performance.

What kind of visual output does it provide?

It generates dark-themed, Bloomberg-style PNG charts showing the cumulative return time series, alongside JSON and Markdown performance reports.

Can I change the benchmark from S&P 500?

No, the S&P 500 (^GSPC) is hardcoded as the fixed benchmark to ensure a consistent, comparable baseline for all alpha and outperformance analyses.

Track Equity Cumulative Return

Name: Track Equity Cumulative Return
Author: fatfingererr

byfatfingererr

0•

Analytics & Monitoring

Analyzes and visualizes cumulative stock and index performance against the S&P 500 benchmark using historical Yahoo Finance data.

This skill enables Claude to perform sophisticated equity performance analysis by calculating cumulative returns for specific stocks or entire indices. It uses a standardized methodology with a hardcoded S&P 500 benchmark to ensure consistent alpha measurement across all comparisons. The skill supports four distinct analysis scenarios, including specific year reviews and year-to-date tracking, and provides high-quality Bloomberg-style visualizations. It is particularly useful for financial analysts and developers who need to quickly rank index components or compare portfolio assets against the broader market directly within their workflow.

Key Features

01Multi-ticker cumulative return comparison and analysis

02Hardcoded S&P 500 benchmark for consistent alpha tracking

03High-resolution dark-themed financial visualization (PNG)

040 GitHub stars

05Automatic Top N ranking for major indices like Nasdaq 100 and Dow 30

06Automated data fetching from Yahoo Finance with local caching

Use Cases

01Visualizing a stock's cumulative return relative to the S&P 500 for a specific fiscal year

02Comparing the annual performance of specific tech stocks like NVDA and AMD

03Generating a Top 10 performance ranking for Nasdaq 100 components since 2022

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add fatfingererr/macro-skills track-equity-cumulative-return

For use in Claude.ai and ChatGPT

Download Skill