The market is heavily manipulated. The driving force behind the meltdown is speculative trade. The system of "private regulation" serves the interests of the speculators.
While most individual investors loose when the market falls, the institutional speculator makes money when there is a financial collapse.
In fact, triggering market collapse can be a very profitable undertaking.
There are indications that the Security Exchange Commission (SEC) regulators have created an environment which supports speculative transactions.
There are several instruments including futures, options, index funds, derivative securities, etc. used to make money when the stock market crumbles.
The more it falls, the greater the gains.
Those who make it fall are also speculating on its decline.