Market Sentiment

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Market Sentiment is a web app created with Flask and Bootstrap. It uses Yahooquery to fetch the latest stock data and Marketaux to fetch the latest news on said stock. The data is then stored in Firebase Realtime Database and relevant information is displayed on the web app.

Features

• Realtime stock data
• Realtime stock news
• Realtime stock sentiment

Sentiment Analysis

Marketaux's API actually provides the sentiment score for each news, ranging from -1 to 1. However, the free version of the API only allows 100 requests per day. To get around this, Market Sentiment sends 6 requests per stock, each request targetting a sentiment range and fetching the news count in that range.

The ranges are as follows:

• 0.15 to 0.39 - Weak Positive
• 0.4 to 0.69 - Moderate Positive
• 0.7 to 1 - Strong Positive
• -0.15 to -0.39 - Weak Negative
• -0.4 to -0.69 - Moderate Negative
• -0.7 to -1 - Strong Negative

The sentiment score is then calculated using the following formula:

raw_sentiment_score = 
  (weak_positive_news_count) * 1 + (moderate_positive_news_count) * 2 + (strong_positive_news_count) * 3 + 
  (weak_negative_news_count) * -1 + (moderate_negative_news_count) * -2 + (strong_negative_news_count) * -3

adjusted_sentiment_score =
  raw_sentiment_score /
    ( 
      (weak_positive_news_count + weak_negative_news_count) * 1 + 
      (moderate_positive_news_count + moderate_negative_news_count) * 2 +
      (strong_positive_news_count + strong_negative_news_count) * 3 +
      100 (bayesian extra value)
    )

The bayesian extra values are added to ensure that stocks with less news are not ranked higher than stocks with more news if they have the same sentiment score.

Preview

Environment Variables

To run this project, you will need to add the following environment variables to your .env file.

MARKETAUX_API_TOKEN - This is your Marketaux API token.

FIREBASE_DB_URL - This is your Firebase Realtime Database URL.

In addition, you will need to add serviceAccountKey.json to the root directory of this project. To get serviceAccountKey.json:

1. Create your Firebase project
2. Click on the project
3. Click on the gear icon and select Project Settings
4. Click on the Service Accounts tab
5. Click on the Generate new private key button
6. Rename the downloaded JSON file to serviceAccountKey.json
7. Place the serviceAccountKey.json file in the root directory of the project

Run Locally

Clone the project

  git clone https://github.com/EricLin-jpg/Market-Sentiment.git

Go to the project directory

  cd Market-Sentiment

Docker

To run this project with Docker, you will need to install Docker and Docker Compose.

Build the Docker image

  docker-compose build

Start the Docker container

  docker-compose up

Python

If you do not want to use Docker, you can run this project with Python.

Install dependencies

  pip install -r requirements.txt

Start the server

  python -m app

API

Get stock data:

GET /api/stock_data

Get news data:

GET /api/news_data

Built With

Frontend: Bootstrap

Charts: Chart.js

Backend: Flask

Database: Firebase Realtime Database

API: Yahooquery, Marketaux