An options chain, also known as an option matrix, is a listing of all available option contracts, both puts and calls, for a given security.

A quick response (QR) code is a type of barcode that can be read by a digital device to provide a greater amount of information than would normally be feasible.

Food web is an important conceptual tool for illustrating the feeding relationships among species within a community, revealing species interactions and community structure, and understanding the ...