Switching to a so-called C-Corp could expand the shareholder base by enabling investors such as index funds to buy the stock.

The report said market-making activities, such as enabling investors to buy and sell shares or bonds, are embedded in proprietary trading activities.

All these stocks saw heightened activity in their call options, enabling investors to buy their underlying shares at a given price and time.

The Bank of Japan has been pumping money into the financial system to keep interest rates low, enabling investors to borrow money cheaply.

Enabling investors to nominate their own directors, is one of its most pressing issues.