A seminal 2012 study that analyzed two groups of companies – similar in terms of industry, size, financial performance, and growth prospects – found that those in the “high sustainability group” had superior share-price performance. And a new study by Morgan Stanley’s Institute for Sustainable Investing, which analyzed the performance of 10,228 open-ended mutual funds and 2,874 separately managed accounts in the US, found that sustainable investments usually met – and often exceeded – the median returns of comparable traditional investments for the periods examined.