investment %'s

IMHO (In My Humble Opinion) it depends on several things including
- how close you are to retirement
- how long you expect to live in retirement
- your tolerance for risk

The basic rule of thumb is - as you get closer to retirement you should shift your retirement portfolio to "less risky" investments - so that there is less volatility in your funds.

It used to be that meant buying bonds in US companies - however in today's world "less risky" may equal more diversified...also people are living much longer these days so a bigger part of your portfolio may need to stay in riskier assets, which in theory should provide a greater return over time...

Bottom line - talk to a trusted, fee based certified financial advisor.