When do we say the market bottomed?

Here is a list of 10 things marketwatch considers to be the signal of a bottom. It is an interesting reading, though I don’t accept all their conclusions.
-
A significant (more than 10%) one- or two-day drop in the market.
-
Timothy Geithner is replaced with Paul Volcker.
-
The 100th day of a bankruptcy by General Motors Corp.
-
Gold at $2,000 an ounce.
-
The Dow Jones Industrial Average changes more than two names at the same time, and/or adds names to increase the overall number of stocks in the index.
-
New York Stock Exchange daily volume drops to 1 billion shares for 30 sessions in a row. "Sometimes you just need everyone to give up to make a bottom," the analysts reasoned.
-
One million jobs lost in a month.
-
The market starts to rally on bad news.
-
Stock market favorites see 15% to 20% declines. When standout companies — such as Wal-Mart Stores Inc.) — "get clobbered" you’ll know a bottom is near, they said.
-
CNBC goes off the air.