The end of 2011 was a rough one for the financial markets. It began in early August when concerns over the inability of the American government to cut a deal on the debt ceiling sparked a massive sell off. It continued through the fall as concerns about the safety of European sovereign debt roiled markets even further. The combination of concerns over political gridlock and troubled European countries helped hold down stock prices.

However, one man remained calm and tried to use the panic of others as a buying opportunity. Berkshire Hathaway’s (BRK.A) Warren Buffett bought up over $15 billion in equities in the third quarter of 2011, seeing the downturn as more of a coiled spring, storing potential energy for an eventual breakout. Well, at least for the time being, it appears as though Buffett and other optimists were in the right. Stocks have shot up over the last quarter, making for the best quarter so far this decade.

Since the start of the year, the Dow Jones Industrial Average has gained 8.57 percent, the S&P 500 is up 12.83 percent, and the Nasdaq gained just short of 20 percent. This massive gain has made those bulls out there who bought up stocks when prices were very low, including the Oracle of Omaha himself.

Biggest Gainers of the S&P 500

So, without further ado, here are some of those members of the S&P that have made the biggest gains over the course of the quarter.

Sears Holding Corporation (SHLD)

Market Cap: $7.10 billion   Gain: 109.85 percent

Sears has more than doubled its share price since the start of the year. The company announced in February that it would be spinning off Sears Hometown, Outlet Businesses, and some hardware stores.

Bank of America (BAC)

Market Cap: $104.27 billion   Gain: 74.1 percent

This one should have Warren Buffett smiling after the $5 billion he invested in the company last year. The gains, fueled by improvements in Europe and passing the most recent round of stress testing, are even more impressive if one goes back to December 20th of last year. Since then, Bank of America is up 94.1 percent.

Netflix (NFLX)

Market Cap: $6.32 billion   Gain: 64.48 percent

Well, look who it is. Of all the stories of plunging stocks from 2011, none took on the Shakespearean-Tragedy levels like Netflix and its 80 percent dive. However, Netflix appears to be on the mend. The company appears to be proving that the collapse of its shares in 2011 was an overreaction as it makes back ground in 2012.

Whirlpool Corporation (WHR)

Market Cap: $5.83 billion   Gain: 59.68 percent

Home appliance maker Whirlpool has been off and running since February 1st when the company issued 2012 EPS guidance that outpaced analysts’ expectation.