Derivative pricing

[poisondarkcandle]

Can someone please explain to me the below? I’m confused
When I read the topic - Arbitrage & Derivatives, it states that by taking a position in an asset (underlying) and an opposition position in derivatives, we will be able to produce a risk-free return (I assume that is return on risk-free asset)
Then I went to read the next topic - Arbitrage & Replication, it says risky asset + derivatives = risk-free asset. I assume that same sign means same position in asset/derivatives. So does it mean these two are contradictory?
Much appreciate your help

 

[S2000magician]

The plus sign isn’t intended to mean the same position: you want offsetting positions.
It’s a confusing way for them to write it.

 

[poisondarkcandle]

thanks for the explanation. So is it correct to say that - derivative/asset is equivalent to the same position with +asset/derivative since derivative & asset have opposite positions?