not sure what you mean refuse to invest in any company you boycott.
But invest in ones you happy to invest in?
For example I was just looking at superlife Ethica's list of shareholdings and one of them is Nestle.
Nestle is notorious for bad ethics, I think it was them that were involved with the whole GE food thing. Novartis is also a drug company.
Koinia emailed me back with some info. On their website they just say no to
alcohol, breweries, pornography, armaments, tobacco and some fossil fuel companies that damage the environment.
(what would an example of a company that endorses pornography???)
But I'm thinking I would add drug Pharmaceutical companies to that list because of all the damage they do to people, including me. I would not want to give them any money as part of a mutual fund.
well again, refusing to invest in them is only a small limitation.
for example if nestle is into bad stuff (and I don't know if they are),
then I would send a line to AFA.net and have them contacted through them, to see if it is legit.
if it is legit, they would be boycotted (again through AFA), and sent out an alert to boycott them.
it's the american family association.
but to find a good company that has no problems is hard.
and those companies one may not even want to invest in (they may not be performing enough on the markets)
again, I don't refuse to invest, because I typically only hold my funds in a company for hours, or days.
boycotts are longer lasting (with my version of investing)
if you are typically long holds (like mutual funds), you can see what their allocations are on their site, and what stocks (up to 5% each) are their performing stocks.
mutuals tend to make a lot less, less than 10% a year.
but some, are more obviously.
some a lot less, into the negative.
I do short term investing. Not long term.
because you can tell what the market will do short term. not really long term.