An investment interest expense is any amount of interest that is paid on loan proceeds used to purchase investments or securities. Investment interest expenses include margin interest used to leverage securities in a brokerage account and interest on a loan used to buy property held for investment. If you're a senior-level candidate and applying for a similar position in a similar industry, you should include your work experience in reverse-chronological order at the top of your resume up to the last 10-15 years. Your rich, extensive experience in the field will be interesting to employers, so it should be highly visible. For mid-level positions, focus on roles you've held that are relevant to the position for which you're applying. You might also decide to include positions like internships and freelancing work if they display any skills or experiences required for the job.