What is the maximum amount of personal residence acquisition debt on which interest is fully deductible on Schedule A? 11 For 2019, Thomas, a single parent, reported the following amounts relating to his investments: nts Net investment income Interest expense on a loan to purchase stocks Interest expense on funds borrowed to purchase land for investment $7,000 2,000 6,000 What is the maximum amount that Thomas could deduct in 2019 as investment interest expense