Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Responsible investing - just a marketing trick?
You are correct that, barring an equity capital raise, your money doesn't actually end up in the company. However, interest in their stock can help a company in other ways; Management/board members hopefully own shares or options themselves, thus knowing that "green" policies are favorable for the stock price (as your fund might buy shares) can be quite an incentive for them to go green(er).  Companies with above average company share performance are also often viewed as financially healthy and so creditors tend to charge lower interest for companies with good share performance.  Lastly, a high share price makes a company difficult to take over (as all those shares have to be acquired) and at the same time makes it easier for the company to perform takeovers themselves as they can finance such acquisitions by issuing more of their own shares. There is also the implication that money flowing towards such green companies is money flowing out of/away from polluting companies, for these "dirty" companies the inverse of the previous points can hold true. Of course on the other hand there is quite an argument to be made that large enough "green" funds should actually buy substantial positions in companies with poor environmental records and steer the company towards greener policies but that might be a hard sell to investors.