When economists say that productivity growth is the root cause of development they are almost stating a truism .
当经济学者提及生产力成长是经济发展的根源时,他们所言几乎是老生常谈。
After years in which financial stocks drove the performance of the broader market , their diverging fortune is causing some investors to wonder if it is time to rethink the truism that as financials go , so goes the market .