Nationwide Building Society revealed details of a new five-year FTSE-100 linked Guaranteed Equity Bond .
The new bond will guarantee a return of all the original capital invested by the customer, plus 85 per cent of any FTSE index growth at the end of the five-year period.
A spokesperson for This is Money stressed that the bonds are not risk-free , although investors are often reassured that they will be able to retain their original capital.
"After years in decline, the stock market has been picking up," the spokesperson added.
"You will have to decide if it will continue to improve, and outperform less risky fixed-rate products or savings accounts."
The minimum investment for the Guaranteed Equity Bond is set at £5,000.




