# In the “tag variants” section of variant summary pages in Open Targets Genetics, why do some SNPs have a posterior probability and others don’t?

**URL:** <https://community.opentargets.org/t/in-the-tag-variants-section-of-variant-summary-pages-in-open-targets-genetics-why-do-some-snps-have-a-posterior-probability-and-others-don-t/322>\
**Category:** Open Targets Genetics FAQs\
**Created:** [23 August 2021 09:41 UTC](https://community.opentargets.org/t/in-the-tag-variants-section-of-variant-summary-pages-in-open-targets-genetics-why-do-some-snps-have-a-posterior-probability-and-others-don-t/322 "2021-08-23T09:41:30Z")\
**Posts on this page:** 1\
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**Author:** ![JeremyS](https://dub1.discourse-cdn.com/flex017/user_avatar/community.opentargets.org/jeremys/32/76_2.png) [@JeremyS](https://community.opentargets.org/u/JeremyS)\
**Post date:** [23 August 2021 09:41 UTC](https://community.opentargets.org/t/in-the-tag-variants-section-of-variant-summary-pages-in-open-targets-genetics-why-do-some-snps-have-a-posterior-probability-and-others-don-t/322/1 "2021-08-23T09:41:30Z")

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Only variants that are in a 95% credible set (and have an absolute probability \> 0.1%) have their posterior probability shown in this table.

  

 ![Tag Variants 1_55055436_G_A](https://europe1.discourse-cdn.com/flex017/uploads/opentargets/original/1X/fd451552869e02d961ec84486a2cd1e9528f7b99.jpeg)

Tag variants for 1\_55055436\_G\_A (rs693668) ([Open Targets Genetics](https://genetics.opentargets.org/variant/1_55055436_G_A)) showing a posterior probability for only one of the SNPs.

  

For more information on credible sets see: [In Open Targets Genetics, what is the “credible set overlap”?](https://community.opentargets.org/t/in-the-open-targets-genetics-portal-what-is-the-credible-set-overlap/272)