Glossary A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1 | 3 | 4 | 5 Definitions by InvestorWords.com   What is...? institutional investor Entity with large amounts to invest, such as investment companies, mutual funds, brokerages, insurance companies, pension funds, investment banks and endowment funds. Institutional investors are covered by fewer protective regulations because it is assumed that they are more knowledgeable and better able to protect themselves. They account for a majority of overall volume. see also after-hours trading, flipping, third market, fourth market, institutionalization, negotiable certificate of deposit, percent held by institutions, pot, private placement, qualified institutional investor, retail investor, sell the book. Copyright ©2009 by InvestorGuide.com. All Rights Reserved.