Answer:
$17,000 debit balance
Step-by-step explanation:
Purchase price 1/1/17 $100,000
market price 12/31/17 $109,000
market price 12/31/18 $89,000
market price 12/31/19 $106,000
12/31/17
Dr Securities fair value adjustment (ABC stock) 9,000
Cr Unrealized gain/loss on ABC stock 9,000
12/31/18
Dr Unrealized gain/loss on ABC stock 20,000
Cr Securities fair value adjustment (ABC stock) 20,000
12/31/19
Dr Securities fair value adjustment (ABC stock) 17,000
Cr Unrealized gain/loss on ABC stock 17,000