A good delivery is understood as an unhindered transfer of ownership of a security from the seller to the buyer in compliance with all necessary requirements.
The criteria for what counts as a good delivery varies from market to market or security to security, but it is a prerequisite for a trade to take place.
Before the advent of computers, a good delivery involved a physical inspection by transfer agents to ensure that certain endorsements were authenticated and registration requirements were met so that the buyer could take delivery.
Preliminary analysis in financial markets refers to the forecasting of various indicators, economic and financial, by evaluating past and present data and parameters.
Arbitrageurs are investors who exploit market inefficiencies of any kind. They are necessary to ensure that inefficiencies between markets are smoothed out or kept to a minimum.
A beneficial owner is a person who enjoys the benefits of ownership, despite the fact that the ownership of the property is registered in a different name.
The bid-ask spread is the difference between the highest price a buyer is willing to pay for an asset and the lowest price a seller is willing to accept.