Xetra HHI Insights

**Overview**

The Herfindahl-Hirschman Index (HHI) is a key market concentration measure, aiding in assessing liquidity quality and concentration risks. It ranges from 0 to 1, considering both participant numbers and volume. HHI Insights provides detailed concentration indicators like buy vs. sell and aggressive vs. passive breakdowns.

- The Herfi ndahl-Hirschman Index (HHI) is commonly accepted measure of market concentration
- It helps market participants to assess the quality of available liquidity and to identify concentration risk
- The measures are expressed through an index value ranging from 0 to 1.
- HHI Insights does not only capture the number of participants, but additionally takes the respective volume into account
- Along with an overall market concentration measure, HHI Insights also provides concentration indicators for several breakdowns, e.g. buy vs. sell and aggressive vs. passive

**Designed for**

Market participants such as
- Buy-side and sell-side traders, researchers and analysts
- Market makers
- Brokerage firms
- Systematic trading firms

**Benefits**
- Using Xetra® and Eurex® proprietary data, HHI Insights provides unique insights into market concentration and the relative demand imbalance
- It gives customers additional guidance when deciding
whether to add a new market to their trading
universe, when setting maximum position limits,
and when adjusting how aggressively they would
like to enter and exit positions

**Data details**
- HHI Insights is calculated by squaring the
market share of each fi rm competing in the market
and summarizing the resulting numbers
- The figures are calculated daily and delivered T+1
- HHI Insights is available for both Eurex and Xetra
instruments
- 24 individual daily HHI fi gures for Eurex® and 18
individual daily HHI fi gures for Xetra®
- Xetra® HHI Insights is calculated on an ISIN level
basis
- Eurex® HHI Insights is calculated on an expiry
basis plus further breakdowns for options
- History is available for Xetra® back to 1 July 2017
and for Eurex® back to 1 January 2017

**A free sample of the Xetra HHI Insights data is available [here](/marketplace/provider/listings/6c03de91-3b82-42ca-ac06-7bb0bb50ef98).**