Options: All option contracts of the same class that also have the same unit of trade , expiration date , and exercise price . Stocks: shares which have common characteristics, such as rights to ownership and voting , dividends , par value , etc. In the case of many foreign shares, one series may be owned only by citizens of the country in which the stock is registered.
SERIES
Meaning of SERIES in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012