The financial sector has been soaring so far in 2012. The Financial Select Sector SPDR ETF (NYSE:XLF) is up over 17% year-to-date, and many big banks have outpaced those gains dramatically – including a nearly 60% surge for Bank of America (NYSE:BAC).

However, investors should beware of many financial stocks – including the much-hyped BofA. The bottom line is that the bottom could fall out at any time, and these big financial stocks are anything but a sure thing.

I watch more than 5,000 publicly traded companies with my Portfolio Grader tool, ranking companies by a number of fundamental and quantitative measures. And this week, I’ve found 10 big bank stocks to sell.

Here they are, in alphabetical order. Each one of these stocks gets a “D” or “F” according to my research, meaning it is a “sell” or “strong sell.”

Banco Santander (NYSE:STD) is a Spanish company that is primarily engaged in the retail banking. In the last year, Santander stock has lost 46%, compared to small gains by the broader markets. STD stock gets a “D” grade for sales growth, a “D” grade for operating margin growth, an “F” grade for earnings growth, an “F” grade for earnings momentum, an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street and a “D” grade for the magnitude in which earnings projections have increased over the past months. For more information, view my complete analysis of STD stock.

Bank of America (NYSE:BAC) is a bank and financial holding company. In the past 12 months BAC stock has slid 31% even after its recent run. BofA stock gets a “D” grade for its ability to exceed the consensus earnings estimates on Wall Street and an “F” grade for the magnitude in which earnings projections have increased over the past months. For more information, view my complete analysis of BAC stock.

Barclays (NYSE:BCS) is involved with retail banking, credit cards, wholesale banking, investment banking, wealth management and investment management services. Since last April, BCS stock has dipped 31%. Barclays stock is down 31% in the last year. BCS stock gets a “D” grade for sales growth, a “D” grade for operating margin growth, a “D” grade for earnings growth, an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street and a “D” grade for the magnitude in which earnings projections have increased over the past months. For more information, view my complete analysis of BCS stock.

China Life Insurance (NYSE:LFC) is a life insurance company, as its name would suggest. In the last 12 months, LFC stock has lost 31%. China Life stock gets a “D” grade for the magnitude in which earnings projections have increased over the past months and a “D” grade for cash flow. For more information, view my complete analysis of LFC stock.

Citigroup (NYSE:C) is a diversified financial services holding company that has experienced a stock loss of 23% since last April even if it is up nicely year-to-date. Citi stock gets an “F” grade for sales growth, a “D” grade for earnings growth, an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street and a “D” grade for the magnitude in which earnings projections have increased over the past months. For more information, view my complete analysis of C stock.

Deutsche Bank (NYSE:DB) is a global investment bank based in Germany. Since this time last year, DB stock has dropped 25%. Deutsche Bank stock gets an “F” grade for sales growth, an “F” grade for earnings growth and an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street. For more information, view my complete analysis of DB stock.

Goldman Sachs (NYSE:GS) is a global investment banking, securities and investment management firm. Goldman stock is down 24% in the last year. GS stock gets an “F” grade for sales growth, a “D” grade for operating margin growth, a “D” grade for earnings growth, a “D” grade for earnings momentum and a “D” grade for return on equity. For more information, view my complete analysis of GS stock.

HSBC (NYSE:HBC) provides a range of financial services to around 95 million customers. In the last year, HSBC stock has experienced a loss of 19%. HBC stock gets a “D” grade for earnings growth, an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street and a “D” grade for the magnitude in which earnings projections have increased over the past months. For more information, view my complete analysis of HBC stock.

Royal Bank of Scotland (NYSE:RBS) is a global banking and financial services group that has watched its stock value dip 45% in the last year. RBS stock gets an “F” grade for sales growth, a “D” grade for the magnitude in which earnings projections have increased over the past months, a “D” grade for cash flow and an “F” grade for return on equity. For more information, view my complete analysis of RBS stock.

UBS (NYSE:UBS) offers wealth management, asset management and investment banking services. UBS is the last stock on the list and has experienced a loss of 33% in the last year. UBS stock gets an “F” grade for sales growth, a “D” grade for operating margin growth, an “F” grade for earnings growth, a “D” grade for earnings momentum and an “F” grade for its ability to exceed the consensus earnings estimates on Wall Street. For more information, view my complete analysis of UBS stock.

Get more analysis of these picks and other publicly-traded stocks with Louis Navellier’s Portfolio Grader tool, a 100% free stock-rating tool that measures both quantitative buying pressure and eight fundamental factors.