The files are delivered at the close of the day prior to market open and contain data points, such as index divisors, index and security dividend points and intraday number of shares. "Interim index constituents" are also included to capture the impact of corporate events on the index, eliminating the need for clients to refer to Price Adjustment Factors (PAFs) for index calculation.

The MSCI Market Open Index files are complementary to existing MSCI files and are available at no additional cost to clients that are licensed to receive the corresponding MSCI data modules.

Three packaged options are available to meeti various client preferences:

• MOI add-on 'Core' security package, available direct and/or through vendors. For clients that automate the processing of a large number of MSCI core indices.
• MOI Integrated Client File (ICF) package, available direct and/or through vendors. For clients receiving MSCI Custom and Thematic & Strategy Indices.
• MOI single index file(s), available direct (no IT pre-processing necessary). For clients receiving a limited number of indices. Each file contains one index, for a given currency and index variant (price, net or gross).

Facilitates index replication - Disseminated after market close (t-1), the market open index file gives a complete description of the index constituents for the next day’s (t) market open and intraday in a consistent and easy to use format. It also provides a list of index changes effective as of the next market close (t) for the following market open (t+1).

Enhances index pricing procedures - Data points such as index divisors help value MSCI indices intraday while dividend points show index dividends expressed as a fraction of the index level.

Certain intraday corporate events are captured as "interim constituents" that explicitly show the impact of the event on the index price level. 

Clients wishing to receive Market Open Index data for more than 10 - 15 indices should use the Core or the ICF packages.