The Gemara in Pesachim (ה:) says if you are holding Chometz for a gentile and Pesach comes you have to burn it. How is it possible to say that: it is Gezel Akum and even if you pay him back you ...
Does anyone know some halachik sources that discuss investing in stocks? There are many potential issues. For example, do you need to worry (about ribbis) if your money is used to lend with interest? ...