The backlog of stocks and overhang means the proportion of stocks that have not yet been sold.

The backlog of stocks to be issued and outstanding stocks are calculated as stock options issued + options to be issued, divided by the number of issued shares

Stocks are ownership certificates issued by joint-stock companies. It is a kind of marketable security issued by a joint-stock company to each shareholder as a shareholding certificate in order to raise funds and obtain dividends and bonuses. Each share of stock represents a shareholder's ownership of a basic unit of the business. Behind every stock is a public company. At the same time, every listed company will issue shares.

Each share of the same class of shares represents equal ownership of the company. The size of each shareholder's share of the company's ownership depends on the number of shares he or she holds relative to the company's total equity.