Active Investing versus Passive Investing
This is the battle that is happening on Wall Street since 1975 when John C. Bogle started the first fund company, The Vanguard Group, in the United States (US) offering to mom-and-pop investors low-cost index funds that aim to mimic the US index returns and charge extremely low cost for it (like 0.1% of the asset per year).
Before 1975, active trading