Investors' usual way of valuing companies is under scrutiny— and it could mean the end of the unprofitable unicorns that dominated in the last decade

· Valuing companies — especially money-losing unicorns — was a challenge for investors before the coronavirus pandemic upended commerce and changed the way the world works.
· Now, hedge funds and other investment managers have to determine what kind of world we will be living in the future — and how a certain company...