Yes, but those are the important ones. Stocks for high expected returns and bonds for stability. You can generalize "bonds" to include other things that return principal plus interest like cash and CDs.
What's the criterion of importance?
...other things that return principal plus interest like cash
Um.... I hate to break it to you...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.