BUFFALO, N.Y. - As the COVID-19 problem spreads most ofthe word, individuals are concerned not just about their health, but also about their jobs, portfolios, and future. According to Christian Tiu, associate professor, if your're thinking opportunistically, you could consider buying some stocks if you can afford it. Amazon and Walmart must continue to deliver. For the time being, everyone is shifting to online education, and Cisco, Zoom, Amazon, and Microsoft are facilitating the transition. Some airlines will recover after taking a beating at the start of the crisis. Should an investor sell his portfolio and exit the market right now, and if not, how can he protect himself financially? Please provide a well detailed answer with references.