Financial market participants ||This article needs additional
citations for verification. (September 2007)| There are two
basic financial market participant categories, Investor vs.
Speculator and Institutional vs. Retail. Action in financial
markets by central banks is usually regarded as intervention
rather than participation. Supply side vs. demand side  A market
participant may either be coming from the Supply Side, hence
supplying excess money (in the form of investments) in favor of
the demand side; or coming from the Demand Side, hence demanding
excess money (in the form of borrowed equity) in favor of the
Supply Side. This equation originated from Keynesian Advocates.
The theory explains that a given market may have excess cash;
hence the supplier of funds may lend it; and those in need of
cash may borrow the funds supplied. Hence, the equation:
aggregate savings equals aggregate investments. The demand side
consists of: those in need of cash flows (daily operational
needs); those in need of interim f