Alternative Data



CBOE publishes daily exports of their most popular indexes which QuantConnect caches for easy deployment. The indexes are centered on their volatility products, and start in 2004.

The VIX index is an up to the minute estimate of how the market expects the volatility to be over the following 30 days, calculated based on the bid-ask spread of SPX options.


Requesting Data

To add CBOE data to your algorithm use the AddData() system to request the data. As with all datasets, you should save a reference to your symbol for easy use later in your algorithm. For detailed documentation on using custom data see Importing Custom Data.

// Daily OHLC for VIX Index since 2004.
var vix = AddData<CBOE>("VIX").Symbol;
# Daily OHLC for VIX Index since 2004.
vix = self.AddData(CBOE, "VIX").Symbol

Accessing Data

Data can be accessed via the Slice events. Slice delivers the unique events to your algorithm as they happen. We recommend saving the symbol object when you add the data for easy access to slice later. Data is available in daily resolution. You can see an example of the slice accessor in the code below.

using QuantConnect.Data.Custom.CBOE;
namespace QuantConnect.Algorithm.CSharp {
    public class CBOEAlgorithm : QCAlgorithm {
        public override void Initialize() {
            SetStartDate(2019, 1, 1);
            // Daily OHLC for VIX Index since 2004.
        public override void OnData(Slice data) {
            // Accessing via Slice event
            var vix = data.Get<CBOE>();
            foreach (var volatility in vix.Values)
                Log($"Value: {volatility.Value}");
from QuantConnect.Data.Custom.CBOE import *

    class CBOEAlgorithm(QCAlgorithm):
        def Initialize(self):
            self.SetStartDate(2019, 1, 1)

            # Daily OHLC for VIX Index since 2004.
            self.AddData(CBOE, "VIX")

        def OnData(self, data):
            # Accessing via Slice event
            vix = data.Get(CBOE)
            for volatility in vix.Values:
                self.Log(f"Value: {volatility.Value}")

All custom data has the properties Time, Symbol, and Value.

Historical Data

You can request historical custom data in your algorithm using the custom data Symbol object. To learn more about historical data requests, please visit the Historical Data documentation. If there is no custom data in the period you request, the history result will be empty. The following example gets daily ohlc for vix index since 2004. historical data using the History API.

// Request 60 days of daily ohlc for vix index since 2004. history with the vix Symbol
var history = History<CBOE>(vix, 60, Resolution.Daily);
# Request 60 days of daily ohlc for vix index since 2004. history with the vix Symbol
history = self.History(CBOE, vix, 60, Resolution.Daily)


Data Properties

Personal Trading

QuantConnect provides this data set for personal use. Nothing special is needed for personal live trading.


Application ContextSubscription Fee
All ApplicationsFree

About the Provider

In 1993, Cboe Global Markets introduced the Cboe Volatility Index® (VIX® Index), which was originally designed to measure the market's expectation of 30-day volatility implied by at-the-money S&P 100® Index (OEX® Index) option prices. The VIX Index soon became the premier benchmark for U.S. stock market volatility. It has been regularly featured in the Wall Street Journal, Barron's and other leading financial publications, as well as on business news shows, where the VIX Index is often referred to as the "Fear Index."

You can also see our Tutorials and Videos. You can also get in touch with us via Discord.

Did you find this page helpful?

Contribute to the documentation: