Final answer:
Mitch's recognized gain from the sale of stocks per the information provided is $700,000, which is calculated by subtracting the basis of $600,000 from the selling price of $1,300,000.
Step-by-step explanation:
To determine Mitch's recognized gain from the sale of the stocks he received from the joint brokerage account in his divorce from Thelma, we need to look at his basis and the selling price. The basis of the stocks was $600,000, which is the amount originally invested in them. When Mitch sold the stocks for $1,300,000, the recognized gain would be the selling price minus the basis. Therefore, the correct recognized gain is option 3) $700,000 ($1,300,000 - $600,000).
The payments made by Mitch to Thelma as described do not affect the calculation of the gain from the sale of the stocks. Since no other information is provided that would indicate a need to adjust the basis or the selling price for purposes of calculating the gain, we can conclude the $700,000 figure is indeed Mitch's recognized gain on the disposition of the stocks.