I went back in my revision history. Again for what it's worth (perhaps nothing), at 7:53AM ET this morning, I added this sentence: > Citadel is a hedge fund an

I went back in my revision history. Again for what it's worth (perhaps nothing), at 7:53AM ET this morning, I added this sentence: > Citadel is a hedge fund and market maker. Its success has vaulted founder Ken Griffin to a net worth of more than $20 billion. Technically, the two sides of Citadel (hedge fund / market maker) are split into two separate arms -- but they are both under one parent company and owned by Ken Griffin. This was posted on HN (again, not by me) after I added that sentence.