1. An un-executed order that is still valid.2. The start of trading on a securities exchange.
ed in the context of general equities. Having either buy or sell interest at the indicated price level and side of a preceding trade. "Open on the buy/sell sid" means looking for buyers/sellers (for someone who is a seller/buyer). Antithesis of clean.
The price paid in a security''s first transaction of the current trading day.