Understanding why a portfolio can be diversified and still fall sharply

Simulated community examples only. Not financial, tax, investment, or legal advice.

My portfolio owns broad funds across many companies and countries, yet during the recent downturn nearly everything on the screen fell together. I thought diversification meant the pieces would offset one another more often. I now realize it mainly reduces the risk of any one company ruining the plan, not the risk of the entire stock market having a rough year. How do you explain the difference between diversifying within stocks and holding assets that respond differently to economic shocks?

  • long-term-investing
  • understanding
  • portfolio
  • diversified
25

4 replies · Sort: Best

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  1. LS
    lakshmi.16
    6 points

    1 reply

    I think of it as “less drama from one bad apple,” not “no drama at all.” Your broad funds did their job; the market itself was the thing thr...

    61 reply

    I think of it as “less drama from one bad apple,” not “no drama at all.” Your broad funds did their job; the market itself was the thing throwing a tantrum.

    6
    1. KF
      ledger_kelly
      0 points

      That’s the part people miss at first. Correlation within a crisis can make everything look connected, even when the underlying holdings are very different.

      0
  2. RI
    ledger40
    4 points

    1 reply

    A simple way to say it is that stocks can be diversified across many baskets and still all live in the same weather. If the whole market cat...

    41 reply

    A simple way to say it is that stocks can be diversified across many baskets and still all live in the same weather. If the whole market catches a cold, most stock funds sneeze together.

    4
    1. DG
      jones-d
      3 points

      Right, and that’s why people add things like cash, bonds, or other assets that don’t move the same way. Diversification inside equities mostly reduces company-specific bad luck.

      3