What is Off-board?
Off-board meaning in finance terminology / glossary / dictionary is:
Used for listed equity securities. Transacted away from a national securities exchange even though the stock itself is listed, such as on the NYSE, and instead of on the OTC market, a regional exchange, or in the third or fourth markets (between customers directly). After 9:30 a.m., if the stock has not opened due to the exchange’s discretion, trading can occur elsewhere, but the trader must assume the role of a quasi-specialist in the process.