---
title: "Changes to Exponentially Weighted Moving Average Model (EWMA)"
method: POST
path: "/assets/covariance/matrix/forecast/ewma"
---

# Changes to Exponentially Weighted Moving Average Model (EWMA)

`POST /assets/covariance/matrix/forecast/ewma`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 22 revisions.

- **2026-04-03** `24e65d80f8eb`: 1 breaking, 1 info
- **2026-02-08** `ac51d393c9a9`: 1 breaking, 1 info
- **2025-05-16** `148ff00a3baf`: 1 info

## Changes

- **2026-04-03** `24e65d80f8eb`: 1 breaking, 1 info
  - removed `subschema #1, subschema #2` from the request body `oneOf` list
  - added `subschema #1, subschema #2` to the request body `oneOf` list
- **2026-02-08** `ac51d393c9a9`: 1 breaking, 1 info
  - removed `subschema #1, subschema #2` from the request body `oneOf` list
  - added `subschema #1, subschema #2` to the request body `oneOf` list
- **2025-05-16** `148ff00a3baf`: 1 info
  - the `covarianceProxy` request property default value changed from `demeanedPeriodToPeriodReturnsOuterProduct` to `periodToPeriodReturnsOuterProduct`

---

[Operation](https://skmtc.dev/portfoliooptimizer/apis/portfolio-optimizer/docs/assets/covariance/matrix/forecast/ewma/post.md) - [API](https://skmtc.dev/portfoliooptimizer/apis/portfolio-optimizer.md) - [Page](https://skmtc.dev/portfoliooptimizer/apis/portfolio-optimizer/changes/assets/covariance/matrix/forecast/ewma/post)