I just bought my first home, a 500k condo. Just in the process of getting my mortgage, my broker says I shouldn't put down 20% which was my original intention, that I'd be better served putting down 10% and investing the remaining 50k.

I wanted to put down 20% to avoid the mortgage insurance, and pay less interest, but he said that rates are so low I stand to gain much more for my money by splitting it and investing in the stock market. Any advice appreciated

Edit: wow this blew up, wasn't expecting so many answers. Just got off work and will sift through, thank you for all the advice.