Code Writer
To create a plot showing the year-to-date (YTD) stock gain percentages for NVDA, MSFT, AAPL, and GOOG, we will need to perform the following steps:

1. Retrieve stock data for each company.
2. Calculate the YTD gain percentages for each stock.
3. Plot the YTD gain percentages over time.
4. Save the figure to a file named ytd_stock_gains.png.

Here's an example of how you might implement this using Python with libraries like yfinance, pandas, and matplotlib.

import pandas as pd
import matplotlib.pyplot as plt
import yfinance as yf
from datetime import datetime

def calculate_ytd_gains(stock_data):
    """Calculate the year-to-date gain percentage for the stock data."""
    start_price = stock_data.iloc[0]
    ytd_gains = (stock_data - start_price) / start_price * 100
    return ytd_gains

def plot_ytd_gains(stock_symbols):
    """Plot the YTD gain percentages for the given stock symbols."""
    
    # Initialize a figure and axis for plotting
    plt.figure(figsize=(12, 6))

    # Retrieve today's date
    today = datetime.now().strftime('%Y-%m-%d')
    
    # Loop through each stock symbol
    for symbol in stock_symbols:
        # Download historical data
        stock_data = yf.download(symbol, start='2023-01-01', end=today)['Close']
        
        # Calculate the YTD gain percentages
        ytd_gains = calculate_ytd_gains(stock_data)
        
        # Plot the YTD gains
        plt.plot(ytd_gains.index, ytd_gains, label=symbol)
    
    # Customize the plot
    plt.title('YTD Stock Gain % for NVDA, MSFT, AAPL, and GOOG')
    plt.xlabel('Day')
    plt.ylabel('YTD Gain %')
    plt.legend()
    plt.grid()
    
    # Save the plot to a file
    plt.savefig('ytd_stock_gains.png')
    plt.close()

# List of stock symbols to plot
stocks = ['NVDA', 'MSFT', 'AAPL', 'GOOG']

# Generate the plot
plot_ytd_gains(stocks)

Note:

• Ensure you have the yfinance module installed. You can install it using pip install yfinance.
• The script downloads data from Yahoo Finance starting from January 1, 2023, up to the current day.
• The plot is saved to a file named ytd_stock_gains.png which will be in the same directory as your script.
• The calculate_ytd_gains function computes the percentage gain based on the closing prices retrieved for each stock ticker.

This script should produce a line plot showing the YTD stock gain percentages for NVDA, MSFT, AAPL, and GOOG. Adjust the timeframe and symbols as needed for your specific use case.

Code Executor
exitcode: 0 (execution succeeded)
Code output:
[100%**] 1 of 1 completed

[100%**] 1 of 1 completed

[100%**] 1 of 1 completed

[100%**] 1 of 1 completed
YF.download() has changed argument auto_adjust default to True

Code Writer
It looks like your script executed successfully, and it downloaded the stock data as expected. The output indicates that yf.download() completed without any errors for each of the stock symbols (NVDA, MSFT, AAPL, GOOG). The message you're seeing (YF.download() has changed argument auto_adjust default to True) is just a note about a recent change in the yfinance library, indicating that the default behavior now adjusts prices for corporate actions like splits and dividends automatically.

Here's a quick explanation of what's going on:

1. Data Download Completion: The stock data for each ticker successfully downloaded, as indicated by the progress bars reaching 100%.

2. Message on auto_adjust: The yfinance library has a parameter auto_adjust that ensures that the downloaded data considers stock splits, dividends, etc. This note is informing you that the default setting is now True, which is generally what you want for accurate gain calculations.

3. File Output: The plot of YTD stock gains should be saved as ytd_stock_gains.png in the directory from which your script was run.

If you haven't observed the resultant plot image, you might want to check your current working directory to view ytd_stock_gains.png. If you would like further customization or have additional questions, feel free to ask!

Code Executor
TERMINATE