Three countries rank higher than California in GDP: the United States, China, and Germany.

Despite these challenges, the world's second-largest economy isn't imploding entirely — some sectors continue to thrive ... Read next BI Tech Memo An icon in the shape of an angle pointing ...

Although results vary, most estimates place the financial services sector at around 20% to 25% of the world economy. A Growing, Shifting Sector Market estimates project that the financial services ...