DionysusToast
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i got the maths wrong rampton - edited the last example on a $50 stock it's actually fkin easy to make money.
lets take the example of SIRI which currently tardes at $2.14. Lets say we are going to tarde this in 1000 share blocks. to keep things simple we have negotiated $0.003 per tarde commission and we get $0.003 rebate from our ECN, so basically if we get filled we capture the spread of $0.01 and the rebate and commission cancel each other out. so we make 1000 x $0.001 = $10 every time we get filled. at 20:1 BP only have to put up $107 in margin (= 1000 x $2.14 / 1000). got me thinking now if you could clip 10,000 at a time that would be $100 per fill. do that 10 times a day and you earn $10,000 per day. of course we pay a 5% profit split to the shop but that is still nice. I might have some of it. lol.
I think you are underestimating the difficulty of capturing the spread.