The phrase "additional investment" refers to putting more money or resources into something that already had some investment. It means adding extra funds to support or improve a project, business, or any other endeavor. Full definition
In fact, as I have argued for many years, this is simply an automatic consequence of additional investment in the investment - driven growth model. (carnegieendowment.org)
There's usually a minimum additional investment of $ 50 or $ 100 for monthly investments. (novelinvestor.com)
You can make additional investments in the same fund. (relakhs.com)