Updating my NRI status for KYC,mutual fund,stock and other investment?

I have my investment made as indian resident. Now i am planning to register myself as NRI since i moved to US for employment from last year.
Mutual fund,Stocks,savings account,KYC all are created and registered as resident. Now when i ask my banker he is suggesting me to close all this and reopen new account.

I dont want to redeem mutual fund/sell stocks but would like to retain them and update my status alone to NRI. Is that possible?