@friends-haran you can PM using the little envelope icon on top right of the page.
(a) Unless you stay in the US for a long time --- because when you stay a long time and then leave the USA, you will need to get an "Exit" certificate and that may entail not only paying all due taxes at that time but also pay taxes on gains ( mark-to-market ) -- imputed gain --- of assets held .
(b) Given the uncertainties of the future, you need not worry about possible taxability at time of departure from the USA. Also the exchange rate fluctuation may affect everything. If your long-term goal / plan is to go back to home base, then investing in India with its attractive returns ( Rupee based ) nay be worthwhile.
(c) At the moment only dividends that are paid out will have to be recognized and taxed by the USA. But if only the market value of the shares increase and no dividends are declared then there is no tax to be paid.
Is there more I can do for you ?
Namaste ji
pk
