Editor's Note: The following are questions received from viewers of "Mad Money," seen every day at 6 p.m. EDT on CNBC.

What is happening with UnitedHealth Group (UNH) - Get Report?-- Art from California

James J. Cramer:

Nothing is happening with UnitedHealth. The company took a hit this week on an industry downgrade from Credit Suisse and an earnings miss from a competitor, but I view any weakness in the health care cost-containment companies as a solid entry point. (Please note that I own this stock for my charitable trust,

ActionAlertsPLUS.)

Is your opinion changed on two bad calls you made for IBM (IBM) - Get Report and U.S. Steel (X) - Get Report?-- Mike from San Francisco

James J. Cramer:

Guess what? I make mistakes. I was wrong on both IBM and US Steel. That's the nature of the stock market. It can make you look foolish just as quickly as it can make you rich. I now believe IBM is a buy, and U.S. Steel is not as much of a sell as I thought it was.

Is now a good time to pick up some America Movil (AMX) - Get Report following the huge pullback?-- Ross from Illinois

James J. Cramer:

What Ross is referring to is the stock's drop from about $60 a share to about $20 a share on Thursday. The stock didn't really get cut by two-thirds, though. The company split its stock 3-1, meaning shareholders received three shares of stock for every one share they already had. Because no economic value is actually added when a company does a stock split, the share price is adjusted accordingly. (Please note that I own this stock for my charitable trust,

ActionAlertsPLUS.) Considering, then, that the value hasn't changed, I wouldn't be selling or adding here.

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