Following are the week’s biggest winners and losers. Find out why shares of Aetna and Perfect World popped while Caterpillar and Wells Fargo dropped.   Read More

With no significant economic data and few earnings reports released today, futures are modestly higher on this quadruple witching Friday. While volume and volatility have continued to be seasonally light, traders expect a little pop at the open on the expiration day of stock and index futures and options.    Read More

Here's our Fast Money Final Trade. Our gang gives you tomorrow's best trades, right now!   Read More

The Lightning Round is extended in this CNBC.com exclusive feature.   Read More

Following are the day’s biggest winners and losers. Find out why shares of Palm and Fortress popped while Home Depot and Moody's dropped.   Read More

Even though Warren Buffett always says he likes stocks more when they're cheaper, he didn't do a lot of buying as Wall Street's major indexes fell to their bear-market lows (so far) in early March.  Berkshire Hathaway's first quarter stock portfolio snapshot shows no blockbuster buys. A few stakes did, however, get bigger during the first three months on the year.   Read More

The bad economy isn’t bad for everyone. In fact, Jeff Macke has spotted an area where fortunes are thriving because of the downturn.   Read More

Investors can capitalize on America's national demand for values and bargains with an ETF that holds the top discount stocks.   Read More

The Financial Accounting Standards Board has voted to relax the fair-value accounting rules - allowing banks to mark securities to a model rather than to market prices, according to reports.   Read More

The fate of an important accounting rule will have a big impact on markets Thursday and beyond. It's not just any accounting rule. It's the highly controversial mark-to-market rule, criticized for the massive write downs in the banking industry.   Read More