Investors are pummeling one of Brazil's largest providers of medical diagnostics as the company struggles under management turmoil and sluggish sales, Bloomberg reports. Diagnosticos da America SA, or Dasa, endured a 24% drop in trading in São Paulo so far this year, according to the story. Why such a drastic drop? Concerns are growing as the company has worked its way through 7 different CEOs or CFOs so far this year, Raymond James analyst Guilherme Assis told Bloomberg. What would help alleviate the situation, the story explains, is for Dasa to develop a strategy to fuel growth as incomes rise in Brazil and more people migrate from the public health system to private providers. Story