Previous studies have found trusting and social individuals to be more likely to participate in the stock market and to hold risky assets but why is this and does individuals that already participate in the stock market benefit from being more trusting and social? In this paper, I try to answer these questions by combining survey and administrative data for a random sample of individual investors in Sweden. More specifically, I test whether trust and sociability are associated with the financial information investors use when making their financial decisions and with the returns of their stock portfolios. I find that investors who trust information from media and financial advisors use these two sources of information more frequently when making their financial decisions compared to less trusting investors. Similarly, social investors use information from friends, family, and financial forums more frequently than less social investors. Finally, I find that trusting and social investors acquire higher simple and risk-adjusted stock-portfolio returns suggesting that an increase in both trust and sociability can help investors to make better financial decisions.