Nadex Adjusts Strike Width for US Indices Event contracts

Pursuant to Section 5c(c)(1) of the Commodity Exchange act and Commission Regulation Section 40.6(d)(2)(iv), Nadex is providing notice that due to increased volatility in the underlying markets upon which the Nadex US Indices contracts are based, Nadex adjusted the strike width for its Daily US Tech 100 Event contracts from 6 to 12, its Daily Wall Street 30 Event contracts from 20 to 40, its Daily US 500 Event contracts from 3 to 6, and its Daily US SmallCap 2000 from 2 to 4. Additionally, Nadex adjusted the strike width for its Weekly US Tech 100 Event contracts from 12 to 24, its Weekly US 500 Event contracts from 12 to 24, its Weekly US SmallCap 2000 Event contracts from 6 to 12, and finally its Weekly Wall Street 30 Event contracts from 100 to 200. The changes began on August 19, 2019 and continued through August 23, 2019. The changes are planned to continue through September 6, 2019.