Rav Eliyashev holds that dina dmalchusa dina does not apply on issues of ben adam lchaveiroi
So, Rav Eliyashev would allow insider trading*? He has no problem if I photocopy someone’s sefer (which I bought legitimately) and start selling it on the street for 50% off?
The Wolf
* Using inside information may be unethical in a fair market, but it’s not stealing.