Commodity prices and the market

Pam Martens is worried about falling commodity prices.

"Yesterday, domestic oil (West Texas Intermediate or WTI) dipped below $50 a barrel during intraday trading, reaching a level not seen since April. Gold closed at the lowest price in five years while sugar traded at a six year low. Wheat has lost almost 9 percent since last week. The Bloomberg Commodities Index traded at a 13-year low yesterday."  

Her worry is based on the following chart linking commodity prices to the Dow Jones during the Depression.