Those investors would be far better off in the long run with a simple and cheap portfolio, comprising of various index funds. (cheerfulegg.com)
You spend a lot of time and effort and even then you probably won't outperform a passive portfolio composed of various index funds. (canadiancapitalist.com)
Figure 9 - 3 shows the growth of a dollar in various indexes over the course of 86 years, marked with 15 major news events listed in Figure 9 - 4. (ifa.com)