Final answer:
The value to be reported in net income for the adjustment would be the unrealized gain, which is $6,000, representing the increase in the market value of the bond from the purchase price to the year-end valuation.
Step-by-step explanation:
The subject of the question involves the reporting of investment values for financial securities in Accounting. Specifically, it pertains to securities that are classified as trading securities. When a company purchases an investment with the intention of selling it in the near term, it is classified as a trading security. The changes in fair value of trading securities are reported in the net income for the period in which the change occurs.
In this scenario, Harvard Co. purchased a bond for $30,000 and at year-end, the market value of that investment had risen to $36,000. The adjustment to net income would be the unrealized gain, which is the difference between the market value at year-end and the cost at the time of purchase. Thus, the value to be reported in net income would be $6,000 (option C).