Robert Hum is the Markets Producer at CNBC.
In three months, Facebook has underperformed all other stocks on the three major indexes and lost $50 billion in market cap.
Precious metal prices have fallen sharply from last yearâ€™s highs, but that certainly won't dampen Olympic athletes' spirits when they receive the prized medals in London.
Something unusual happened last week.
According to the Stock Trader’s Almanac, the Dow Jones Industrial Average has fallen in the week following June quadruple witching for 13 consecutive “unlucky” years.