Blackboard Trading
The trading of commodities and futures contracts off a blackboard found on the wall of a commodity exchange.
Investopedia Commentary
Not all commodity- and futures-contract transactions occur electronically. On some smaller exchanges or on certain contracts where the volume of trade is relatively small, blackboard trading is a cheaper and logical alternative to electronic trading.
Related Links
Futures Fundamentals
Becoming Fluent in Options on Futures
See also: Board Broker, Chicago Board of Trade - CBOT, Commodities, Exchange, Futures Contract, Globex