The selling of a stock or commodity not owned by the seller.
Green shoe
A provision in an underwriting agreement that if there is an exceptional public demand, an issuer will authorise additional shares for distribution by the syndicate.
Greenmail
The situation by which a large block of stock is held by an unfriendly company, which forces the target company to repurchase the stock at a substantial premium to prevent a takeover.
Grey market
The market in a new issue prior to formal offering.
Gross
Before deduction of tax.
Grossing-up
Calculating a gross or pretax rate of interest or dividend by adding a notional amount of tax to the net, or post-tax amount received.