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In the modern marketplace, to protect against volatility and risk, people negotiate contracts that deal with things that are yet to become a reality.

However, as I read the gemara in Bava Metzia 33b, along with Mishneh Torah: Sales 22:10 and Shulchan Aruch Choshen Mishpat 209:4, this practice seems forbidden.

My question is this: what are the modern halachic opinions about the possible permissability of trading in such future (and therefore non-existent) goods and how do they interpret the sources above?

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    I didn't check all your sources but suspect they all might refer to the impossibility rather than the prohibition of such trade. In any event, if you do see prohibition, why are you asking if there's prohibition? Are those sources insufficient?
    – msh210 ♦
    Sep 14, 2019 at 16:54
  • To repeat msh210: "לֹא קָנָה כְּלוּם" means the contract/the sell is invalid, it does not forbid such contracts.
    – Al Berko
    Sep 14, 2019 at 19:30
  • @msh210 I am asking for more modern sources/application of those sources to the modern marketplace, where I assume futures are sold much more commonly than when the sources I found were written
    – SophArch
    Sep 15, 2019 at 0:42

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