Below is an announcement from CME Group in regards to the 2-Year Note Futures contract

As a reminder, CME Group will reduce the minimum price increment for 2-Year Treasury Note futures by half (to 1/8 of 1/32nd) effective Sunday, January 13, 2019.

The decision to reduce the minimum tick was prompted by client demand, broad market validation and analysis of resting liquidity.

For more information, the following resources are available:
• Client Impact Assessment
• Special Executive Report (SER)