[papabrown]

I'm not sure if they're still around, but I remember back in the 1990s there was a family of mutual funds that aimed to do exactly what you're describing. They actually advertised the fact that they won't have the best returns in bull markets because they were protecting people in down markets.

The idea was that people benefitted more from staying in the market over a long period of time rather than maximizing their returns in any particular year.

So the fund was aimed to smooth out the peaks and valleys along the ride so investors would be more inclined to leave their money parked in the fund rather than getting a statement that said that they're down 30% and going to cash and missing the next run up.