The coronavirus pandemic hit women's job security and productivity the hardest, taking a significant toll on their mental health compared to men, new research shows.

The cost of food and healthcare continue to eat up retirees' nest eggs, according to a retirement index that shows overall day-to-day necessities are becoming too expensive.

An $11.2 billion superannuation fund will halve its administration fees later this month.

The superannuation sector's assets reached a milestone of $3.04 trillion at the end of 2020.