# About the Wiki: Monetary Policy Is there something not completed?

**URL:** <https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229>\
**Category:** Uncategorized\
**Created:** [October 14, 2019, 11:16am UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229 "2019-10-14T11:16:11Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![RBCHI](https://avatars.discourse-cdn.com/v4/letter/r/bbe5ce/32.png) [@RBCHI](https://forum.grin.mw/u/RBCHI)\
**Post date:** [October 14, 2019, 11:16am UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229/1 "2019-10-14T11:16:11Z")

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# Monetary Policy

[he first four years of Bitcoin emission rate are identical to the first four of Grin.](https://plot.ly/~Bobby_Digital/1/#/) Bitcoin had a full reward for 4 years, followed by half that for the following 4 years. So compared to a constant supply, after 8 years, the total amount of coins emitted is only 33% less. Compare that to daily price fluctuations（is there not completed？）.

source:[https://github.com/mimblewimble/docs/wiki/Monetary-Policy](https://github.com/mimblewimble/docs/wiki/Monetary-Policy)

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**Author:** ![Kurt](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/kurt/32/3361_2.png) [@Kurt](https://forum.grin.mw/u/Kurt)\
**Post date:** [October 14, 2019, 12:12pm UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229/2 "2019-10-14T12:12:22Z")

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I think there is a mistake in github: it is 25% less.  
we are being harsh with grin here 🙂

let’s say grin and bitcoin issue 100 coins during the first 4 years. then after 8 years bitcoin has issued 150 coins (halving at the 4th year) and grin 200.  
200\*(1-25%) = 150, hence the 25% (and not 33)

the confusion has maybe come from the fact that 150\*(1+1/3)=200, which translates into Grin has issued 33% more coins than bitcoin after 8 years.

Inflation who ? 🙂

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**Author:** ![RBCHI](https://avatars.discourse-cdn.com/v4/letter/r/bbe5ce/32.png) [@RBCHI](https://forum.grin.mw/u/RBCHI)\
**Post date:** [October 14, 2019, 12:23pm UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229/3 "2019-10-14T12:23:35Z")

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> [@RBCHI](#):
>
> Compare that to daily price fluctuations

It seems like use 200/150 = 4/3  
4/3-1=1/3（33%）

but what I want to say is this sentence “Compare that to daily price fluctuations” seems not completed。

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**Author:** ![Kurt](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/kurt/32/3361_2.png) [@Kurt](https://forum.grin.mw/u/Kurt)\
**Post date:** [October 14, 2019, 12:30pm UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229/4 "2019-10-14T12:30:03Z")

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if you have a cake of 2kg and another cake of 1.5kg, then the second cake is 25% lighter than the first, not 33%

for the “not completed” that you re pointing out, I have no clue

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**Author:** ![RBCHI](https://avatars.discourse-cdn.com/v4/letter/r/bbe5ce/32.png) [@RBCHI](https://forum.grin.mw/u/RBCHI)\
**Post date:** [October 14, 2019, 12:32pm UTC](https://forum.grin.mw/t/about-the-wiki-monetary-policy-is-there-something-not-completed/6229/5 "2019-10-14T12:32:57Z")

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> [@Kurt](#):
>
> for the “not completed” that you re pointing out, I have no clue

Yes,I agree what you talk about, and try to think why the author would said 33%.  
Exactly you are right.

And If someone has clue ,welcome to tell me and pull request.