Yahoo finance's My portfolio and watch list - Once a successful, delightful product that quite widely recommended online. Yahoo has tragically ruined it. One of the many examples: why you stop the ability to add a lot to portfolio with negative number of share indicating a sell. I see you want to replace it with the Add transaction of sell, did you think thoroughly of it and ensure the user experience and usability! I did your way of Add transaction of SELL, that the summary becomes so confusing and misleading. Did you even test out the use cases and scenarios before you let it out the door. Oh my god, it is so painful! How complicated can it get for a date field entry. Among yyyy, mm, and dd, why does it keep wiping out each others. How months/years this ridiculous issue has to exist before you prioritized a fix! If one doesn't know better, there would have been joke that someone in yahoo had colluded with competitor. Otherwise, why would yahoo work so hard to push away existing customers! If that is your goal, congratulation. Just to let you know you succeeded! We are ditching it. What a pity that previous teams and leaderships once put in tremendous thought, heart, energy, intelligence building a well thought out, well-designed, fantastic foundation and product many years ago. You just trashed it entirely with your so called enhancements, updates, or redesign.