Is it necessary to memorize all the possible risk- free assets when solving for the Sharpe Ratio?

I’m not sure if I have covered risk- free assets in my reading, but what are risk- free assets?

Is it necessary to memorize all the possible risk- free assets when solving for the Sharpe Ratio?

I’m not sure if I have covered risk- free assets in my reading, but what are risk- free assets?

Nominal risk-free assets: Treasury bills, notes, and bonds.

Real risk-free assets: TIPS.

Thanks again for all the help!

You’re welcome.