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justrobert

61 karma · joined January 31, 2017

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justrobert··on A beginner’s guide to getting started in the cryptocurrency world
The funny thing is a state level actor can spend <0.01% of their defense budget to take control of >51% of the network.

That isn't even accounting for the fact they can knock others off the bitcoin network easily. If you have 10,000TH/s but cannot communicate with the network, that hash rate means nothing. DDoS or bad BGP routes, doesn't matter when the nodes have no way to talk.

justrobert··on Bitcoin: A Peer-to-Peer Electronic Cash System (2008) [pdf]
Bitcoin is far from infancy.

The futures are a nice touch, but they are cash settled so they will drift from spot.

We still do not have a spot market with swaps from companies you can trust.

Due to this, negative exposure is still difficult to replicate, hence why some brokers will not offer short side on the futures.

justrobert··on Bitcoin: A Peer-to-Peer Electronic Cash System (2008) [pdf]
A node is just a computer that has the whole blockchain.

A standard node will almost never produce a single new block.

For that, you need custom asic or luck.

justrobert··on Whale Watching: Many companies earn a huge portion of sales from a few customers
The mobile space is built around whales.

A recent mobile linage game came out, and it is the ultimate gacha (spend to gamble for random chance of results) game.

Those that spent at least $5000 were at the top in no time. To be in the top 500 you had to spend over $200.

It is sad to see the industry this way, but there are people willing to pay so the market exists.

justrobert··on Portugal’s radical drug policy is working. Why hasn’t the world copied it?
Except anyone can buy fent online easily.

Far more dangerous for anyone who is near those that buy it.

justrobert··on Alibaba hits nearly $18B in ‘Singles Day’ orders in 12 hours
You mean the Chinese government will stop protecting their currency and hurt their export?

That isn't likely to happen soon even though other governments want them to float freely rather than in a price band.

China doesn't hold enough USD to hurt the US economy without hurting themselves even more seeing as the bonds are non-callable by the buyer.

justrobert··on 'Zombie ant' brains left intact by fungal parasite
As a fan of stop motion, thank you for this.

I'm glad to see he got funding for ep3 of the series.

justrobert··on Quantopian hedge fund has lost about 3% since beginning of trading in June
Back testing based on OHLC on a crash day isn't very useful for many systems.

The bid/ask of instruments become illogical. Bad trade data in the live feed won't be in your historical data.

Intraday during a liquidity drop is mostly based on your relationship with your broker. How they handle margin calls will decide if your trades survive.

For example, traders have had margin calls on option spreads with a known fixed risk at the time of opening. But the individual legs of the trades were making very incorrect markets, so the broker algorithms issued margin calls and liquidated at the worst time possible.

justrobert··on The first Bitcoin Cash block has been mined
3 day notice? Did you check your emails from coinbase? I got an email on 7/19 warning about the fork.

The email laid out the process if you want access to the fork.

justrobert··on Employees Who Stay in Companies Longer Than Two Years Get Paid 50% Less
The point is, when someone has offers from other companies for 10% increase (which imo is pretty low usually it is 20% or more), the employee finally realizes their value.

In these situations often the employee is getting raises that do not even cover inflation. So the employee now sees their market value and would like to continue working for the company, but they have realized they could take on risk for a 20-50% raise instead.

I mean the risk equation is simple, with such a raise you can save enough cash to justify the risk even if it doesn't work out.

I always ended up taking the offer from the more generous company, and they tended to increase my pay to offset more than inflation and then a bonus to justify staying.

justrobert··on Ask HN: How to prepare for algorithm trading interview as a developer
The risk is based on the fact he might get the job without the sample, but by providing the sample he might not get the job.
justrobert··on Introducing Object Storage
I wasn't even discussing moving production environments, just the beta test seems to highly favor DO in terms of cost.

But that is fine, if enough users are willing to front the cost of testing.

justrobert··on Introducing Object Storage
I think the lack of a pricing model and how short the free period is (until Oct 2017) makes it hard for many users to even justify testing it.

For me it seems if a developer has to spend more than an hour testing this new product they are better off using S3.

justrobert··on Ask HN: Good Career Alternatives for 50+
Though one issue with most leveraged ETF/ETNs is how they aim to replicate the daily return of the index. So by holding it longer than a day, your returns are path dependent.

So if you are holding the leveraged ETF for a month and the index has a positive return, it is still possible for you to have a negative return.

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