https://en.wikipedia.org/wiki/Op%C4%87a_opasnost
https://en.wikipedia.org/wiki/Opcode
https://en.wikipedia.org/wiki/OpCapita
https://en.wikipedia.org/wiki/Opa_Opa
https://en.wikipedia.org/wiki/Opcode_Systems
Hedge, redução de volatilidade dos lucros e o efeito sobre …