Answer:
1,000 shares
Step-by-step explanation:
The 318 attribution rule states that stock owned directly or indirectly by a partnership is considered to be owned by any partner that owns 5% or more in the business.
This is relevant to family owned businesses and is a way to mark out principal owners of a business in order to avoid tax evasion and fraud.
In this scenario John directly owns 700 of the outstanding shares. But according to the 318 attribution rule, since he he is a 50% partner he owns half of the outstanding 2,000 shares. That is 1,000 shares.