4 ms·

If those are the greatest risks, it sounds like it's easy to buy low and sell high. I would have thought that that's the biggest challenge.

• wombat23 5y ago
  Well it kinda is. Empirically, you could have bought a share of the SPX at any point in time, and sold it with profit later. The real problem is what happened in the time between, and whether you were able to hold on.
  • dmos62 5y ago
    You can buy shares in an index?
    • danuker 5y ago
      You can buy shares in an ETF (exchange-traded fund) that tracks an index (buys and sells to attempt to keep exposure the same as the index).