Is climate change a problem for investors? Commonwealth CIO Brad McMillan puts it to the test. : Is climate change something that we, as investors, should be keeping an eye on? To figure this out, we need to look at the data and see where it leads us. Let’s start by evaluating the risk by posing the following questions: As to whether climate change is an immediate problem, this could be a tough one as “immediate” can have a different meaning here.