Since May 2018, I have been acquiring US stocks, my average stock purchase price is about $500 and that's basically most I can afford.

Still, I'm paying a commission $5 for each transaction, in general, I'm paying a 1% fee for each stock purchase

Now I decided to raise a little bit my investment in US stocks and instead of spending $500 spend $550 every time when adding new stock to the portfolio. 

A small increase could lead to higher returns in the form of dividend income

With 2019, I will probably raise this minimum stock purchase to $600.