1.
You can become a freelancer and sell your services at the many freelancer sites
2.
There a few sites in which you contribute content, and then you can join one of the sites in which you publish to a community, and then you are paid or rewarded by how many inside the community that read what you write. This is one such site, but there are many https://medium.com/explore-topics
3.
You can seek out publications you to which you think you are capable of producing content, and email them your stuff, in your case perhaps a financial news site.
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