> Welcome to the Polymarket Changelog. Here you will find any important changes to Polymarket, including but not limited to CLOB, API, UI and Mobile Applications.
<Update label="Mar 17, 2026" description="March Madness: $2M+ in Liquidity Rewards">
* **March Madness Liquidity Rewards**: Adding \$2M+ in liquidity rewards to both live and pregame markets.
* **How it works**: Liquidity rewards are payments for placing competitive bids. Rewards are paid out based on the size of your orders, how close they are to the midpoint, and how consistently they are quoted relative to other liquidity providers. Orders must be active on the book for a minimum of **3.5 seconds** to be eligible.
**Daily reward rates for markets (subject to change):**
**48 hours before GameStartTime:**
* \$7.5k for full game ML market
* \$500 for 5 other markets (most recently created full game spread, most recently created full game total, 1st half ML, most recently created 1st half spread, most recently created 1st half total)
**From game live to game completion (note: rewards are expressed in daily rates):**
* \$60k for full game ML
* \$4k for most recently created full game spread and most recently created full game total
**From game live to halftime (note: rewards are expressed in daily rates):**
* \$8k for 1st half ML, most recently created 1st half spread, most recently created 1st half total
* **Markets**: [Browse March Madness markets](https://polymarket.com/sports/cbb/games)
* **Crypto market fees expansion**: Starting March 6, 2026, taker fees and maker rebates extend to all crypto markets including 1H, 4H, daily, and weekly. The same fee structure as existing crypto markets applies. Only new markets created after March 6 are affected.
* **Updated documentation**: [Fees](/trading/fees) and [Maker Rebates Program](/market-makers/maker-rebates) updated to reflect all crypto market coverage.
* **5-minute crypto markets**: Launched with taker fees enabled. Fees follow the same curve as 15-minute crypto markets, peaking at 1.56% at 50% probability.
* **Maker Rebates**: Liquidity providers earn daily USDC rebates funded by taker fees, same as 15-minute crypto markets.
* There has been a significant change to the structure of the price change message. This update will be applied at 11PM UTC September 15, 2025. We apologize for the short notice
* We're excited to roll out a highly requested feature: **order batching**. With this new endpoint, users can now submit up to five trades in a single request. To help you get started, we've included sample code demonstrating how to use it. Please see [Create Orders](/trading/orders/create) for more details.
* We're adding a new `side` field to the `MakerOrder` portion of the trade object. This field will indicate whether the maker order is a `buy` or `sell`, helping to clarify trade events where the maker side was previously ambiguous. For more details, refer to the MakerOrder object on the [Orders](/trading/orders/cancel) page.
We're excited to introduce a new order type soon to be available to all users: Fill and Kill (FAK). FAK orders behave similarly to the well-known Fill or Kill (FOK) orders, but with a key difference:
