What are "regional bid and ask prices"?

A regional stock exchange is a stock exchange not located in that country's primary financial center, and where regional companies are listed. Often, companies who cannot meet the strict listing requirements of a national exchange may qualify for a listing on a regional exchange, though a company that qualifies to be on a national exchange may also register for a listing on one or more regional exchanges.

Some examples would be:

• Boston: Primary focus is mutual funds.
• Chicago: Trades regionally listed stocks and stocks from other exchanges
• Pacific: Known for derivatives