Depends, there's some more complex formats defi systems out there now. Synthetix for example allows you to buy SNX tokens and then yeild farm on these against a B-Book which is filled with synth tokens (the synth tokens are derivatives of real assets e.g. sUSD, sAUD, sXAU, sFTSE) so you can trade against real financial instruments.

You can take a look at their litepaper [1] if you want to know more.

[1]: https://docs.synthetix.io/litepaper