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

I've taken a recent interest in using silver as a hedge for inflation, after reading somewhere that the metal could trade up toward $10 an ounce. What do you think of Newmont Mining (NEM) - Get Report and Pan American Silver (PAAS) - Get Report?-- Nate from Ohio

James J. Cramer:

While I like both of these companies, my favorite mining stock currently is

Sociedad Quimica

(SQM) - Get Report

. The Chile-based company produces fertilizer, iodine and lithium, rather than gold and silver, but I believe it's going to be a winner. The stock has already doubled year-to-date, but management is solid and I expect the company can build on last year's 62% earnings growth.

I'm a cable installer, and have been going through a lot of Terayon Communications( TERN) product lately. Is the stock as cheap as it looks?-- Pat from Virginia

James J. Cramer:

Just because a stock is trading for $3 doesn't mean it's inexpensive. For one thing, the modems that Terayon makes have become commoditized, significantly cutting into the company's margins. For another, Terayon's balance sheet is highly leveraged, with debt equal to 42% of its total capitalization. At the end of the day, I believe the stock should be avoided.

I'm having trouble understanding why we should buy Boeing (BA) - Get Report and its suppliers when all of the major airlines are struggling financially. Can you explain?-- Tom from Orlando, Fla.

James J. Cramer:

Good question, and I'll tell you why. For one thing, Boeing's new, lighter 787 plane doesn't have any steel and uses about 25% less gas. It actually will make financial sense to purchase new planes, besides the fact that customers don't want to ride around in an aging bucket of bolts. That's the one major expense the airlines continue to be saddled with. For another, Boeing does a lot of its business overseas. And while the U.S. government just goes out of its way to keep our airlines alive, many major foreign airlines are actually financially controlled by their respective governments. I stand behind this stock; I own it for my charitable trust,


Want more Cramer? Check out Jim's rules and commandments for investing from his latest book by

clicking here

. Learn how to become a better investor. Get started now with the investing rules that Cramer lays out: