Common investing mistakes in the effective altruism community

This was written in 2015 and no longer reflects all my current thinking, though I think still makes some good points.
Many in our community are investing money to donate later, as well as saving for retirement and emergencies. Here’s some mistakes I’m concerned they’re making when investing.
I’m not a qualified financial advisor, and this should not be taken as investment advice. For speed, I’m also not referencing all my claims and this piece isn’t as thoroughly researched as normal – I just want to get the ideas out there. Please do your own research before making any investments. This post is based on personal interests of mine, and was not written in work time.
This post is aimed at people who already understand the basics of personal finance and investing. Some starting points for an introduction are here and here.
In summary:
- Don’t expect to earn 7-10% returns from US equities. It’s more likely to be 1-7%. Adjust your assumptions about retirement savings and giving now vs. giving later calculations accordingly.
- The baseline portfolio is the global market portfolio, roughly 40% international stocks (half US, a quarter emerging and a quarter other developed markets), 20% corporate bonds, 30% international government bonds, and 15% real assets. If you don’t think you can beat the market, this is much closer to what you should invest in than 100% US equities.