Right, Bill, but that depends on your strategy. Once again, I personally invest for long term. I'm not concerned about my investments going down 10% today for a market lull so long as 20 years from now they've made me a healthy return, and allow me to afford the $50/gal AvGas for that Aztec I want to fly. Now obviously if they keep on going down 10% a day, then pretty soon I'm going to be out of money.
So in my case, I've got some good investments that I want to periodically review and see if it makes sense to change them, but ultimately I really just want to leave them alone and let them do their thing. Think about it like your plane. Do you want to have to constantly fix it and make adjustments, or just jump in, turn the key, and fly it every time without constant tinkering? For me, I am more interested in the flight aspect of it than the repair asepct of it (even though both interest me) so I would rather have the plane that I can just leave alone, do an annual on, and otherwise not have to worry about it.