skysight-inc/HackerNews huggingface dataset:
TL;DR: Defending HFT’s argues for rewarding market participants who simply jump in front of the line b/c they see other people doing it, at the expense of participants who have worked hard to decided which line to get into.

Here's a more fundamental question to ask:

What kind of behavior do you want to reward in the stock market?

If you view the stock market as a bunch of numbers that wiggle around, where "information" is conveyed by the actions of other people participating in the market (ie, what they’re buying and selling), then the HFT's play a legitimate role in spreading that information around.

If you view the market as a place to buy and sell businesses (equivalently - shares of businesses), where capital is allocated to businesses commensurate with the value they provide to society, HFT's are parasites on the effort of others.

There are participants in the market that spent an enormous amount of time, diligence and thought into deciding allocating capital to businesses according to the value they ascribe to the businesses. For these participants, the signal they send by putting out their orders is currently taken advantage of by other participants who spend enormous time, effort and money into trying to “tap into” the result of the efforts put forward by the first group and rush to another exchange to buy up that company before anyone else gets there.

So: Do we really want to reward all of the effort spent building faster machines, communication links, and algorithms to jump right in front of someone in line? Or do we want to reward those people who are actually determining which businesses have intrinsic value and which do not?

It's easy to hate Einhorn or Ackman b/c they're rich. What's important to keep in mind is that they are custodians of and act on behalf of thousands, probably even millions of other people to improve their financial situation. Pensions, endowments, sovereign wealth funds, etc make up the bulk of the funds that Einhorn, Ackman and others invest. The fact that they're rich an indication of their legitimate hard work at researching and allocating capital and enhancing the financial well-being of their clients. (Note: yes, there are always bad apples that get rich by illicit (read: insider) means, but that is an exceedingly small amount of participants and over time they usually get caught).

Warren Buffett has often said that a perfectly good stock market would be one which is open only one day a year, where participants put up orders based on the value they actually ascribe to a business. If those orders cross, then trades occur - all in one day.

Makes you wonder what would happen to society in that market. Would people would be able to find a way to channel all the frenetic activity currently employed in chasing prices and watching others’ actions into a more productive endeavor?
Will flash trades now lead to a financial transaction tax?
> "... and they report that it's not that hard"

Heh, I've heard my boss (the co-owner of an ISP) say those exact words I don't know how many times.

NB: It's harder than it sounds.
Nope, I don't see these being sold in Radio Shack. The world of electronics distribution reaches way beyond Radio Shack.

I mean: Before the Raspberry Pi, there were Linux-capable ARM Dev Boards, but the vast majority of them were niche items, over $150, and you had to call up the manufacturer and convince them to sell you one. (oh, and don't you dare use this in production without securing a larger purchase agreement!) Now, there's a proliferation of sub-$100 Linux-capable boards being sold by all the distribution houses, in large quantities, with no or limited restrictions on use in production.

I hope this move from the Raspberry Pi foundation does the same thing for OEM SOMs. Right now, there are only a handful of SOMs on Digikey/Mouser, most with fewer than 100 units in stock, all (that I can find) over $100, with zero community of support. Most of the companies with strong reputations in the market require a phone call before they'll even agree to sell you units for sampling.
WhatsApp 20bn daily outgoing messages is roughly the same as global SMS
What things have you achieved on this front?
This is exactly what I did with programming. I could figure it out and produce something after a great deal of effort, but it exhausted me. Meanwhile, I can hammer out 1000 quality, edited words and barely notice it.

You can probably guess where I put my focus.
reading about the stock market is always kinda disgusting to me. "If a speculator believes AAPL is undervalued, he buys a bunch of shares of AAPL. This drives up the price until AAPL is no longer undervalued - then the speculator can sell his AAPL and reap the profits." -- the part after the dash shocked me :) seems like the entire purpose of the market is speculation? does anyone actually invest in companies any more? :D

i did like reading this, informative. gave me a nice other perspective on HFT.

however:
(a) Goldman Sachs does not have it's own HFT outfit? they are the "helpless victims" here? sounds a little unbelievable.
(b) why is it exactly socially beneficial that some HFT company performs this "robin hood" act (lol)? particularly if it exposes us all to the risk of market volatility due to mindless algorithms performing enormous, senseless trade volumes with each other?

all in all, i'd vote for that very small tax on trades, just to get rid of this as-yet-unseen level of speculation.
Strictly speaking, ERP aligns more with MIS than CS. Moreover, ERP would be challenging to learn in a vendor-independent manner, which good or bad, is the way most CS courses are structured.
Seems more like "The customers we don't have want what we don't have"
I would bet that if global warming doesn't destroy us before, we will master inbreeding before we're able to go for a 1000 years space exploration tour.
First of all, we need better engines. We need better engines and better probes to be able to investigate candidate systems up close. We won't send humans before we have thoroughly evaluated the environment and ensured it's, if not safe, habitable. It's OK if they take centuries to arrive, but it would be really great if they didn't. They could also be accelerated and decelerated at much more than 1G, something we would prefer not to do with a live payload.

Second, we need better engines, better robots and better manufacturing technology. Once the right planet is found, we'll send supplies and robots that can build the colony mostly from local resources. Hopefully, all that can withstand much greater accelerations than humans would.

Only then we can send humans, with human-rated engines (we can't do much more than 1G for any significant part of the trip) and a complete habitat that can sustain the population for the duration of the trip (as seen from the passengers - relativistics may apply, depending on our progress with the all-important engine thing)

So, before we have better engines (and get rid of the bureaucratic problems with nuclear reactors in space), it's really a waste of time to think about how large the crew should be. We can have that data if we build marginally better engines (yes, they are key) and colonize other planetary surfaces and asteroids. Eventually, some populations may opt to isolate themselves.

Also, don't forget we may end up learning a lot about genetics well before we can build a relativistic engine. It's perfectly reasonable to imagine we could reintroduce (or introduce, or remove) any genetic trait we want in the population at any time we need to.
Currently the site says: "No attribution is required, this free version of Comic Neue has been released into the public domain." and links to CC's public domain page at http://creativecommons.org/publicdomain/zero/1.0/ .
You're implicitly begging the question by assuming that HFT is bad, and therefore permitting it is bad, regardless of any further evidence. The point here is that if an exchange successfully removed HFT, and that materially hurt people, that is evidence that HFT isn't bad.

I'm simplifying a simplification, and I personally would be among the first to point out that this is still just a one-point sample of a horrifically multidimensional space. My point is not to specifically claim that HFT is good, a matter that I still have no personal opinion on, but to point out the question begging. If HFT is shown in fact to be a net gain for consumers, then you should not blithely carry on with the presupposition that it is bad.
Fortunately, neither Bitcoin or Ethereum has a DOM.
The returns aren't that high though. Even the top firms now barely make anything after costs.

The stock market is designed for traders! The primary purpose of a stock market is to let stockholders transfer risk most efficiently. The capital raising was done when the company issued shares. People buying stocks are not investing.
And an additional 256MB (512MB versus 256MB for the Model A).
South Africa has serious structural issues preventing a tech revolution: a rotten school system, a welfare-based economy with a tiny tax base, that is dependent on credit-driven consumer demand rather than production, underinvestment in infrastructure, and government with a huge mandate, that is too timid/rent-seeking to change things (heaven help us if our Proportional Representation system fragments into something like those of Israel or Italy), big business that has a long tradition of collusion and price-fixing, a white minority that is hell-bent on maintaining the status quo, and a union movement that cripples job creation. Previously, South Africa was a resource-driven economy - there are limited traditions of entrepreneurship.

The chances are good that the African startup revolution, if it comes, won't start in South Africa.
Something like AppEngine would be a good callback handling mechanism. Something that could start more boxes, for example.
Apple faces a severe potential financial crisis in coming years -- one that dwarfs Microsoft's. They rely so heavily on the premium subsidy for their revenue that if the subsidy is merely brought down to normal levels they will see a huge drop in revenue -- and this assumes that they keep selling the same number of phones.

Now that there are viable alternatives in Android, and to a lesser extent Windows Phones, with much lower subsidies, I think you'll see the carriers push these other devices.

And if we move to a model where consumers pay for the full price of the phone (which is what much of the world does today), then you'll actually see iPhone sales fall. Sub $200 low-margin phones are the future. Apple can still do well with a premium phone -- especially if the camera is really good, but I think it's a tougher niche than the high-end PC market.
Picking the Brooklyn Bridge
Surprised nobody has mentioned this yet, but if you use (or can move to) Namecheap for your domain registration, they provide free DNS service that includes dynamic DNS [1]. The script to set it is merely an HTTP GET to a URL. A lot of routers provide that ability as part of their dynamic DNS set up (I know dd-wrt does, as does the Mikrotik router I currently own).

[1] https://www.namecheap.com/support/knowledgebase/category.asp...
That's private information. It is an important distinction. You're saying the market should have a right to know whether I plan on selling my shares next year.
'Black box signals' raise hope of finding MH370 in days – Malaysian minister
David Einhorn is a hedge fund manager, not a mutual fund manager. Vanguard, one of the world's most reputable mutual fund managers, is on record as saying that HFT has improved their cost to trade.

That was an easy point in your comment to respond to. The rest of it doesn't appear to have been based on Chris Stucchio's post at all; you could just as easily have posted it in every thread on HN about HFT. I must be missing something; what is it?
In Scrutiny of Comcast Merger, Internet Choice Will Be Crucial Battlefield
SD cards have different classes- without seeing specs, I'd be willing to bet that a Class 10 SDhc card is on par with this EMMC storage.
This is not true, JDE brings in WAY more revenue than Peoplesoft does for Oracle. When PeopleSoft purchased JDE originally they wanted to kill JDE, but after Oracle bought PeopleSoft they realized they could keep it alive and make a profit on it.
I’m not sure I understand the science behind that: they insist on showing a actual phone, running normally, therefore I’m assuming that means the battery isn’t different, right? The WSJ article doesn’t exactly give much details.

That thing is fed with standards copper-wires that can handle current, that can be of a certain voltage and amperage -- both are presumably linked. You can do funky things with time, like alternating, but… other than shove with higher voltage, I don’t see how you can feed that much energy in there, not unless you change the battery technology. And that’s not possible.

Therefore, what they have and the big bulky thing is a prototype battery. IT is an order of magnitude too big for the moment — not really a problem until you go though industrial design, I’m guessing. One that appears not to heat as much, otherwise that think would be burning when holding.

My question is: why do we have to guess so much from a video?
My point is these traders get to know things before other traders, thats not fair, everyone should see Bob's purchase order at the same time and arguing that Bob has an unfair advantage because he knows what he's going to do before the HFT's know what Bob's going to do is just silly.
Or "Prospects (tive customers) want what we don't have"
> And you think it's morally wrong even if it leads to better functioning markets with lower costs and better prices for everyone else.

But it doesn't lead to any of these things. It leads to worse-functioning markets with worse prices for everyone else.

Where do you think the profits made by HFT come from? The air? Ghosts? Fairies?
This makes YCombinator look bad. Did they know about this before investing in Zidisha? If not, maybe consulting the likes of GiveWell could be a good idea.
http://zonomi.com may be useful for the "i have a domain but don't want to DIY a DynDNS replacement" crowd. A single zone with up to 10 records can be hosted for free, and one of the features is a simeple GET based update API for DynDNS style operation.
You don't necessarily need a perfect understanding of biology to do this. Just avoiding homozygotes for any rare genetic variant you don't have flagged in your database as well-understood will go a long way to avoiding in-breeding issues.
My knee jerk reaction to this is disgust. Which typically means that it deserves a lot more research and validation on my part. I thought Zidisha was a game changer and a website I could be proud to support. I didn't look at it as a way to invest but a way to support young entrepreneurs in other countries. Does anyone else see anything about this that is redeeming for Zidisha?
If something sounds too good to be true, it probably is.

Consider internal resistance, power measured in watt-hours, and thermal behavior. When I was a kid, I grew around drag racing. Lots of times, I saw incredibly powerful cars try to put over 1000hp to the wheels at once, and just snap an axle or explode a transmission.

An iPhone battery is about 5.45 watt-hours. To charge that in 30 seconds from mostly dead (say 5 watt-hours), you need over 500 watts, discounting any thermal losses! Do you think the tiny solder joints at the power coupling are really designed to take 500 watts of power? Devices designed for 500 watts of power look more like your refrigerator.
If you work for company XYZ, or XYZ has hired you in some capacity only then is it insider trading. And that's because you have a fiduciary duty to XYZ that you have violated by releasing their secrets.
Plenty of jobs are stressful, so why the special fuss about academia?
Paytime
>You do realize that 600 dollars a year is next to nothing for a business?

I get that. But at that price point, there are similar solutions available with much more coverage and features. This isn't actually competing with DataDog, Munin, Nagios, New Relic on features or reliability.

>? This could cost thousands of dollars or more. Backup not done? Could be millions of dollars for some kinds of businesses.

If thats the bussiness risk you are taking, you shouldn't be depending on just a ping after a cron job! Phooff. You do realize this thing is essentially only measuring if the cron job has executed. Not if it is succesfull. Sure you can script the success/failure state. But how are you going to test that against a myrid of potential failure states? What does the proccess return when the OOMKILLER gets its? Do you know?

The only reason to use something that 'just does pings' is because it's not important enough, and you don't want to invest that much time and effort. Those other tools require to be a integral part of your setup, but they'll give you much better monitoring capabilities and actual ease of mind. More importantly, rather than warning you when things have gone wrong (after the fact), they'll warn you in advance things are not looking good. They'll monitor the actual proccess, not if they were launched every hour, but what they were up to.

This product is in a very interesting niche because it seems to target projects-not-important-enough-i-wouldnt-bother-but-if-its-this-easy-why-not. But it is not priced accordingly.

>Should I ever need such a service. As I said before, I don't need it right now.

Those projects where you don't need them for: those are only ones where a product like this makes sense. If there are lots of dollars on the line, i strongly suggest you use actual industrial-grade monitoring solutions, not a ping after a cron job.
If folks are interested in having a person to talk to while doing SICP, we're doing it in the iPad app we released last Thursday. We were going to do a Show HN, but hey, HN's already talking SICP!

Understudy: https://itunes.apple.com/us/app/understudy/id782635884

The setup is basically like private music lessons. We pair you with a somewhat more advanced student also doing SICP. The deal is to

(1) Work on SICP by yourself during the week

(2) Once a week, discuss the material with your more advanced partner. The app builds in a videochat + whiteboard communication tool (you can see it in the app screenshots).

(3) When you get about a month in, also start discussing with someone who is just starting out. When you help that person understand, it very much improves your own understanding.

Basically, it gives you good discussion with people who are genuinely interested in SICP.

We've been running it in beta for a while – see https://twitter.com/understudyapp .
http://zonomi.com has this functionality exposed via a simple GET based API, and it's available on their free account too
Minor qualification: some people are out to get you, but you can't live your life worrying about it.
For them, they have a fiduciary duty to their clients to act in their customers' best interest. So, if their clients asks to purchase, for example 100,000 shares of AAPL, it would be illegal for them to first drive up the price.
p.s. how does moderation on this site work? i have been downvoted, and i wonder - is this an act of some admin moderating, or do users with sufficient karma get a downvote button and one of them simply dislikes my comment?..
It's private information right up until the millisecond that your trade hits the exchanges. Then it's public information.
It's less about the people and more about the resource capabilities on the ship. If the ship has machinery that can rebuild things like a chip Fab for example, and the knowledge to repair all said machines, it becomes more feasible. If the ship has no machinery to construct advanced machines/facilities even 100,000 might not be enough to construct advanced tech.
OP here. It's true that Heroku were required to pre-install a lot of dependencies, because they don't offer a way for developers to specify additional dependencies to be installed on their servers.

On the contrary, with pkgr.io, additional build and runtime dependencies can/must be added by the package maintainer if anything other than the base stuff is needed. See https://pkgr.io/doc#dependencies and, as an example, the .pkgr.yml file for a fairly complex project such as Gitlab: https://github.com/pkgr/gitlabhq/blob/pkgr/.pkgr.yml.
Why would it not be? You're taking money from the original owner [edit: and costing the buyer more] through asymmetry of information. You are providing no service to either of the parties.
How is it any different from arbitrage? If I see the price of ES move in Chicago before others and trade SPY in NY based on that, is it front-running?

Somebody will make that trade, so we're really just arguing over who gets the money.
I think you are confusing "analyzing public information in a new way" with "getting access to non-public information". The former is what all smart traders do, the latter is illegal.
been using one for ~1 year : https://gist.github.com/sajal/1572219
> Hence, why do we connect to IP addresses, rather than connecting to public key hashes? Granted, public key hashes are not routable, but there could be a service to provide the mapping from hashes to addresses [...]

As I understand it, this is already an issue with the IP protocol. Here's a Google Tech Talk from 2007 discussing the issue with having both the unique ID and location identifier be a single thing (IP address): https://www.youtube.com/watch?v=QIGSMLrU4Xw and the solution: https://en.wikipedia.org/wiki/Locator/Identifier_Separation_...
Well, in the case of the rPi, a swarm of CPU's with large RAM would be nice. Something 'unique' to plug the rPi into, which gives it a bit more oomph.

Well, I suppose this play to put the rPi "platform" everywhere, is to be expected. But I don't really see the appeal in this when there are already multi-core ARM DIMM's to be played with. This is clearly a brand play by the rPi folks, and after all .. why not..
If we're all going to cite Vanguard, we should at least get the quote right:

There are literally hundreds of strategies that are high-frequency trading, ranging all the way from those that really perform much of a market-making and liquidity-providing function to perhaps some on the opposite end of the spectrum, where they are abusive and trying to manipulate the market, " he said.

Obviously, we need to get rid of those types of high-frequency traders, but I think the bulk of them are creating liquidity and reducing spreads for us, which has dramatically reduced costs.
“Can” and “does” are two very different things.
Ah, OK, thanks for pointing out that feature of pkgr. I think Heroku would do well, in a hypothetical Cedar+1, to allow both buildpacks and apps to specify additional Ubuntu packages to be installed in the container, and then dramatically strip down the base system.
My understanding of Apple's business model is that they plan to make most of their money from the 30% commission on in app purchases, and their share from media sales made through iTunes. The sale of the hardware is just a way to get a purchase platform in the hands of the consumer.

Apple could probably sell a sub $200 iPhone with no difficulty, and then pay off the subsidy using their other sources of indirect revenue. Of course in that case we will probably see iPhones become even more of a walled garden, and a lot more of a crackdown on jailbreaking.
5 ways technology has changed recruiting forever
Those were my thoughts as well., I wonder though how long frozen eggs and sperm are viable. Could you really rely on then for 2000 years?
I have yet to see a crystal clear definition of REST. Where would be the best one you have found?