You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Bill_%26_Melinda_Gates_Foundation

Context:
The foundation trust invests undistributed assets, with the exclusive goal of maximizing the return on investment. As a result, its investments include companies that have been criticized for worsening poverty in the same developing countries where the foundation is attempting to relieve poverty. These include companies that pollute heavily and pharmaceutical companies that do not sell into the developing world. In response to press criticism, the foundation announced in 2007 a review of its investments to assess social responsibility. It subsequently cancelled the review and stood by its policy of investing for maximum return, while using voting rights to influence company practices.

Question:
What does the Trust invest

The foundation trust invests undistributed assets