Is non-disclosure agreement becoming standard practice now?

I have been working as a software developer for PwC for couple of years, but recently I am being asked to sign an NDA - regarding not sharing information about any company including but not limited to clients or for advantage in securities transactions.
I do not interact with clients or their information directly.

Does such NDA mean I am not allowed to buy/sell shares for this company in future?

Not sure if this is the right community for this.