Share your insights or perspective on the financial matter presented in the input.

Should I take out a bigger mortgage, or pay a greater cash deposit?
The answer to your question depends on your answer to this question:  Would you be willing to take out a loan at that interest rate and invest that money straight into stocks? That's basically what you're planning to do. You leverage your stock investment, which is a valid and often used way to improve returns. Better returns ALWAYS come with more risk. Depending on your location there might be a tax advantage to a mortage, which you can take into account.