Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How can I invest in an index fund but screen out (remove) certain categories of socially irresponsible investments?
Hmm, this would seem to be impossible by definition.  The definition of an "index fund" is that it includes exactly the stocks that make up the index. Once you say "... except for ..." then what you want is not an index fund but something else. It's like asking, "Can I be a vegetarian but still eat beef?" Umm, no. There might be someone offering a mutual fund that has the particular combination of stocks that you want, resembling the stocks making up the index except with these exclusions. That wouldn't be an index fund at that point, but, etc. There are lots of funds out there with various ideological criteria. I don't know of one that matches your criteria. I'd say, search for the closest approximation you can find. You could always buy individual stocks yourself and create your own pseudo-index fund. Depending on how many stock are in the index you are trying to match and how much money you have to invest, it may not be possible to exactly match it mathematically, if you would have to buy fractions of shares. If the number of shares you had to buy was very small you might get killed on broker fees. And I'll upvote @user662852's answer for being a pretty close approximation to what you want.