1. Introducing a different topic; in point of fact
   - by the bye, incidentally, apropos

Encyclopedia: By the way

• stock of record
• stock option
• stock power
• stock purchase plan
• stock raiser
• stock saddle
• stock split
• stock symbol
• stock ticker
• stock trader
• stock up
• stock warrant
• stock-in-trade
• stock-index futures
• stock-keeping unit
• stock-purchase warrant
• stock-still
• stockade
• stockbroker
• stockbroker belt
• stockbroking
• stockcar
• stocked
• stocked with
• stocker