273 reputation
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bio website drpaulbrewer.com
location Tennessee
age
visits member for 3 years, 9 months
seen Nov 1 at 23:40

Dr Paul Brewer

Owner: Economic and Financial Technology Consulting LLC eaftc.com

Open Source Projects:

armdisarm.com Unofficial HAMP Loan Modification Calculator

html5csv.js Javascript/JQuery lib for manipulating tabular data

Hobbies:

Amateur Radio Callsign KI6CQ


Apr
13
comment Quantitative before/after or financial engineering studies of a bid or ask tax?
let us continue this discussion in chat
Apr
13
comment Quantitative before/after or financial engineering studies of a bid or ask tax?
@LazyCat Keep in mind there are those who want to tame speculation and "needless" trading. Well, if you really wanted to buy but also set a limit, you could jump a slot and send "buy@20.02" and hope the matching algo gives you 20.01. But as you are seeing, this is a pathological thing, and liquidity will dry up, but perhaps not completely. Trade would go off-exchange. It seems doubtful an exchange has been sabotaged by the greedy tax men in this way but the world is a big place. I've heard rumors of it being proposed from time to time.
Apr
13
comment Quantitative before/after or financial engineering studies of a bid or ask tax?
@LazyCat I edited the question a bit to make this clear. Also I think the correct terminology would be "limit order tax" although I've generally heard it called a bid or ask tax.
Apr
13
comment Quantitative before/after or financial engineering studies of a bid or ask tax?
@LazyCat Yes, it is that pathological. I would expect such a tax to be vehemently opposed by traders, although there are some notorious auction sites that successfully sell tangible goods that way.
Apr
8
comment Any known bugs with Yahoo Finance adjusted close data ?
Close is available already, and won't include the effect of splits and dividends on the return.
Mar
21
comment Keeping a track record honest
Someone can always set up 2^N accounts under different aliases. Through the magic of combinatorial iteration in the 2^N accounts, in one specific account N trades into the future, all N trades will go exactly as planned -- providing the priceless appearance of sheer genius.... Of course, using real money accounts instead of paper trading accounts could discourage this approach...