Finance

The most popular open-source Yahoo Finance connector — historical prices, fundamentals, options chains, and real-time quotes as pandas DataFrames.

Python wrapper for TA-Lib: 150+ technical indicators (MACD, RSI, Bollinger, candlestick patterns) in C speed.

Python library for portfolio performance analytics: Sharpe/Sortino/Calmar ratios, drawdown reports, tearsheets.

Microsoft's open-source quant research and trading platform with ML/RL model support, factor mining, portfolio optimization, and backtesting.

AI4Finance Foundation's lightweight, open-source financial LLM fine-tuned on market news, earnings calls, and SEC filings for sentiment and forecasting.

Goldman Sachs's open-source Python library for derivatives pricing, risk analytics, and systematic trading.

AI4Finance Foundation's framework for training RL agents to trade stocks, crypto, and forex with backtesting, paper trading, and live execution support.

Lightweight BSD-licensed Python library providing 80+ stock technical indicators (RSI, MACD, Bollinger Bands, ATR) as simple DataFrame column lookups.

Google's Apache-2.0 TensorFlow library for quantitative finance — GPU-accelerated options pricing, rate models, Monte Carlo simulation, and autodiff Greeks.

Maintained fork of Quantopian's pyfolio providing comprehensive risk and return analytics, tear sheets, and performance attribution for quantitative strategies.

AI4Finance Foundation's multi-agent platform for financial tasks — market forecasting, report generation, portfolio management, and earnings analysis.