Initial idea can come from news/market trend. Once one industry becomes somewhat interesting, lots of research comes after. Normally you have to go through fina

Initial idea can come from news/market trend. Once one industry becomes somewhat interesting, lots of research comes after. Normally you have to go through financial statements and ratios of each company and compare these to the targeted industry. Tools like finviz screener helps graphical/technical analysis while stockflare tells a short summary of fundamental analysis about the company itself. If you have other holdings rather than that, portfolio mgmt is indeed needed.