The term MSCI U.S. Large Cap 300 Index refers to a composite that includes large cap companies located in the United States. The MSCI U.S. Large Cap 300 is published and maintained by Morgan Stanley Capital International (MSCI).
The MSCI U.S. Large Cap 300 is designed to measure the performance of the large capitalization companies in the United States. The index represents roughly 70% of the free float adjusted market capitalization of the U.S. equities market. At the time of writing, there were 304 constituents in the index.
First launched on March 27, 2003, the MSCI U.S. Large Cap 300 is designed to provide investors with a measure of the performance of the large-cap U.S. equity market. Companies are selected based on float-adjusted market capitalization. All MSCI market capitalization indexes are fully reviewed at the end of May and November. Partial reviews take place in February and August. The performance of this index can be monitored via Bloomberg's real time ticker symbol MZUSL.