I agree. I would think that the problem of yahoo finance is an engineering problem: in fact, Yahoo finance was built on a solid technology that was good 10 year

I agree. I would think that the problem of yahoo finance is an engineering problem: in fact, Yahoo finance was built on a solid technology that was good 10 years ago, but has basically been kept under maintenance ever since. Several attempts have been made to modernize it and they have almost all failed. In addition to this, yahoo finance has been an interim property within yahoo for many years, the kind of place where middle managers would find shelter before their next career move, hence the lack of risk taking. So far, it remains the best finance website in my opinion, but it's sad when you think about how much better it could be.