- u -

• underlying_symbol : longport::quote::OptionQuote , longport::quote::WarrantQuote
• updated_at : longport::trade::Order , longport::trade::OrderDetail , longport::trade::PushOrderChanged
• upper_strike_price : longport::quote::SecurityCalcIndex , longport::quote::WarrantInfo , longport::quote::WarrantQuote
• urrent_turnover : longport::quote::PushQuote