According to ChainCatcher, the annual revenue of US market makers Citadel Securities and Jane Street Group LLC is expected to set a record. According to people familiar with the matter, Citadel Securities' net trading revenue in the first half of the year increased by 81% from the same period last year to US$4.9 billion; Jane Street increased by 78% to US$8.4 billion, both of which are far higher than the speed required to set a new annual record high.