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BTC bubbles

46 points| herrherr | 13 years ago |scottlocklin.wordpress.com | reply

49 comments

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[+] dragontamer|13 years ago|reply
When a worthwhile Futures market hits, then BTC will really stabilize.

He's right. Without shorting, options, and future contracts... it becomes impossible for BTC to stabilize in the wake of media exposure. Add on to the fact that the majority of BTC users seem to be idiots (ie: they look at the price as some sort of indicator of BTC penetration, as opposed to more useful statistics), and you've definitely got a situation where bubbles will continuously form.

Anyway, I don't necessarily think he's right. There will always be some function that fits some data... and he may have gotten lucky this time that data fits his model. Either way, it is certainly an interesting piece to read. And his model seems to have solid theory behind it.

[+] jvm|13 years ago|reply
> When a worthwhile Futures market hits, then BTC will really stabilize.

I agree that a futures market would be a stabilizing force, but other volatile commodities are still highly volatile even with futures markets.

The reason most currencies aren't volatile is that they have a central bank behind them actively manipulating their supply to make sure they are stable relative to some other asset or basket of goods. In the case of the USD, the dollar is roughly pegged to CPI. Unbacked commodities that aren't pegged by a central authority tend to be on a highly volatile random walk, with or without futures markets.

EDIT: Looks like I mistyped, maybe it looked like I was saying the opposite.

[+] tudorizer|13 years ago|reply
You are talking to the wrong kind on BTC users. Hopefully, most of this type of users are gone after the recent events. Aside from that, there's still a vibrant community of people who make useful stuff with BTC.
[+] kiba|13 years ago|reply
What can we learn from this? You can see a “fair value” of around $20/BTC due to be hit in a few weeks, with perhaps a full mean reversion to $10/BTC.

We now have a testable prediction. Let see if bitcoin actually falls to to 20 and 10 dollars per bitcoin within 4 weeks.

[+] Nursie|13 years ago|reply
I'd almost be surprised if it doesn't hit that within a few weeks.

Not necessarily as a stable value, but in the last few days it's bounced around madly between about 50 and 100 dollars. I think at this point it's fair to say that nobody has any idea of the real 'value' of a bitcoin, and mad speculation is still the order of the day.

[+] steven777400|13 years ago|reply
Having not heard of this model before, I'm very surprised how tightly the curve fits, to the point of being sceptical (it's even got the "little" ups and downs" it seems).

Traditionally, the idea with a bubble is that everyone (well, almost everyone) knows it's a bubble, but no one seems to know when it will pop or how far it will fall.

Would this same model have fit the 2008 stock market collapse? Would it have accurately showed when and where the bottom was?

Would this same model have fit the BTC curve as well if the dataset had started 100 or 200 days earlier or later?

Just some curiousity about a model I'm hearing of for the first time.

[+] dragontamer|13 years ago|reply
The issue with the 2008 bubble is that it was in Mortgaged Backed securities (and related derivatives). The Stock Market crashed because when the MBSes crashed, big banks were unable to give loans out to businesses. Without loans, many businesses were unable to pay their employees, etc. etc.

The bubble was specifically in Credit Default Swaps, a derivative of the bond market. The problem here is that CDSes were untracked and unregulated. No one knew there was a bubble because there was no way to see the "fair price" of a CDS. Companies were making deals on CDSes in their backrooms, away from exchanges.

When all of the companies involved in CDSes failed (because people failed to pay their subprime mortgage loans), it killed the banking industry... even those unrelated to the bubble. When your business partner goes bankrupt, you're also in danger. Again: there were lots of factories who couldn't get a loan to pay their workers... because the bank they relied on died in the whole crisis.

This leads to factory closings, lots of people losing their job, and then a general Stock market crash.

But again, Stocks weren't the bubble in 2008. The Credit Default Swaps in the bond market was the problem.

[+] thatthatis|13 years ago|reply
2008 wasn't a bubble so to speak. It was driven by de-levering contagion.

You'd do better to apply it to a 2001 tech index.

The difference is a bubble is driven by greed, and "greater fool" behaviors turning to fear and panic selling. De-levering contagion is driven by a position going down triggering margin calls which necessitate selling other positions which drive down prices which furthers the cycle.

[+] joshuahedlund|13 years ago|reply
Are prices only well described by log periodic power laws if market participants don't know they are well described by log periodic power laws, or does that make things more complicated?
[+] jeremyjh|13 years ago|reply
I don't think that a bubble feels like a bubble to the participants driving it. I remember seeing this same phenomenon with gold prices a couple of years ago. So many people were adamant that "this time its different" even though we have seen gold spike and crash many dozens of times throughout history. Now that some of these people are losing lots of money in gold maybe their views change but it won't matter, next time will be same for the people driving it.
[+] unknown|13 years ago|reply

[deleted]

[+] hobbes78|13 years ago|reply
He's not calling the exchanges worthless, he's calling the exchanges presently offering shorts worthless. I actually didn't even knew there were BTC exchanges offering shorts...
[+] snake_plissken|13 years ago|reply
This is awesome. Hide it from the fanatics on Bitcoin talk, or post it for them to strengthen the feed-back loops?