There is a short document somewhere in the NYSE site that describes the their bitcoin price index.  It is some kind of day average, computed (by a secret formula) from data provided by an extensive list of bitcoin exchanges whose names begin with "Coin", end with "base", and are at most 8 letters long.

The price is updated daily at 16:00:00 UTC (4 pm London time), weekdays only.

It seems very useful, for what I cannot say.

Bitcoin Tracker One (BITCOIN-XBT) daily trading summary:

Date       ! SpN_LO ! SpN_HI !   VNOT !    VBTC !       VSEK !     SpN !  SpU !    UpB ! OBS 
-----------+--------+--------+--------+---------+------------+---------+------+--------+-----
2015-05-18 |   9.66 |   9.73 | 189783 | 948.915 | 1837195.92 | 9.68051 | 8.24 | 234.96 |     
2015-05-19 |   9.61 |   9.72 | 109376 | 546.880 | 1057572.27 | 9.66914 | 8.35 | 231.60 |     
2015-05-20 |   9.68 |   9.79 |  90988 | 454.940 |  886232.68 | 9.74011 | 8.35 | 233.30 |     
-----------+--------+--------+--------+---------+------------+---------+------+--------+-----

Data from the BITCOIN-XBT page at NetFonds.se.

SpN_LO = Lowest price (SEK/note) in specified day.

SpN_HI = Highest price (SEK/note) in the specified day.

VNOT = Number of notes (shares) traded in day.

VBTC = Trade volume in BTC, ignoring fees = VNOT/200.

VSEK = Trade volume in SEK (sum over all trades of num of notes times price per note).

SpN = Average note price in SEK for that day = VSEK/VNOT.

SpU = Assumed SEK/USD currency exchange rate (typically from Google at end of that day).

UpB = Average implied USD/BTC price ignoring fees = SpN*200/SpU

When all costs are considered, electricity from an on-board battery is a lot more expensive than electricity from a wall outlet, and absurdly more valuable for the owner of the device.  Therefore, placing miners on mobile devices like smarthphones, tablets, or laptops makes no economic sense.

Moreover, I cannot imagine any advantage of phsically attaching a mining device to some other device with a different function, except water or space heating.   There is a thing called "internet" that allows a device to send information to another device anywhere in the world; and a system called "bitcoin" that is supposed to allow bitcoins to be sent through the internet, even if  the two parties are not connected to the internet at the same time.

So, instead of having 10 mining chips scattered around, firmly attached to my devices, I could have one mining rig with 10 chips sitting anywhere it is more convenient (for example, in my water heater, or in the attic of my summer home in Iceland), sending bitcoins to other devices if, where, and when needed.  The centralized rig would certainly be more efficient, could work at steady pace 24/7, use optimized power supply -- and would not burden the other devices with power load, extra heating, board space, etc..  Physically attaching a mining chip to a router makes as much practical and economic sense as attaching a water filter to a toaster, or a lawn mower to a car.

I cannot make sense either of the fuzzy idea that, with miner chips, devices would be able to get revenue to do micropayments for the services they use, or to generate satoshis for "Wide World Ledger" applications like colored coins, authentication, timesamping, etc.  It will be impossible to exactly match the bitcoins produced by a device to its needs: if the device does not run out of bitcoins, it will generate a surplus of them.  My water heater could generate a lot more bitcoins than my laptop, but will hardly need them; whereas my laptop wil probably will need them the most.

So, if my devices had embedded miners, they would have to pool their bitcoin streams and share them on the basis of need; and possibly topped up with purchased bitcins.   Which, again, is better done with a centralized mining rig than with independent miners.  (By the way, in most higher organisms, from corporations to computers to humans, evolution has found it better to use specialized units for the generation of "revenue" (money or energy), separate from units devoted to other functions that spend from that "revenue".)

Finally, adding a mining chip to a battery charger makes it much more complicated, functionally.  Instead of just taking AC 120 V and putting out DC 6 V, a "miner-enhanced" charger will have to communicate with 21.co servers, manage a wallet, interact with other devices, authenticate itself, etc..  Even if most of that complexity is hidden from the owner, enough of it will be exposed to require some of his attention and time.  Which are much more expensive than the electricity or the chip itself...

[ last updated on 2015-05-21 ]

Bitcoin Tracker One (BITCOIN-XBT) notes -- daily trading summary:

Date       ! SpN_LO ! SpN_HI !   VNOT !    VBTC !       VSEK !     SpN !  SpU !    UpB ! OBS 
-----------+--------+--------+--------+---------+------------+---------+------+--------+-----
2015-05-18 |   9.66 |   9.73 | 189783 | 948.915 | 1837195.92 | 9.68051 | 8.24 | 234.96 |     
2015-05-19 |   9.61 |   9.72 | 109376 | 546.880 | 1057572.27 | 9.66914 | 8.35 | 231.60 |     
2015-05-20 |   9.68 |   9.79 |  90988 | 454.940 |  886232.68 | 9.74011 | 8.35 | 233.30 |     
2015-05-21 |   9.74 |   9.79 | 135233 | 676.165 | 1319500.95 | 9.75724 | 8.32 | 234.55 |     
-----------+--------+--------+--------+---------+------------+---------+------+--------+-----

Data from the BITCOIN-XBT page at NetFonds.se.

SpN_LO = Lowest price (SEK/note) in specified day.

SpN_HI = Highest price (SEK/note) in the specified day.

VNOT = Number of notes (shares) traded in day.

VBTC = Trade volume in BTC, ignoring fees = VNOT/200.

VSEK = Trade volume in SEK (sum over all trades of num of notes times price per note).

SpN = Average note price in SEK for that day = VSEK/VNOT.

SpU = Assumed SEK/USD currency exchange rate (typically from Google at end of that day).

UpB = Average implied USD/BTC price ignoring fees = SpN*200/SpU

Is it known how many GH/s does that chip put out?  Any guesses about the size and manufacturing cost of the chip?

This may be of interest:
https://bitcointalk.org/index.php?topic=1012254.0

On 2015-01-13, the owner said that he was working on a complete rewrite of the site:


He hasn't been very active on this forum lately:

Last post: 2015-02-07
Last active:    2015-05-01

Beware that the SEK:USD exchange rate is changing quite a bit.  It was ~8.22 SEK/USD on 2015-05-18,
but ~8.32 on 2015-05-19 and already ~8.35 today.  So the USD/BTC price for yesterday is a bit lower.

http://www.xe.com/currencycharts/?from=USD&to=SEK&view=1W

On the new NYSE Bitcoin Price index:
https://www.nyse.com/publicdocs/nyse/indices/NYSE_Bitcoin_Index_Methodology.pdf


Well, this will surely stabilize the bitcoin price.  No more wild swings of 50 or 100 dollars within a day, or the traditional weekend dumps and rallies.

I suppose that all of you will henceforth use this price index to guide your trading, instead of those silly real-time charts.

 

There is now a bid by ATDF for 10'000 shares at 0.01 $/share (0.10 $/BTC).  And also a sell offer by them for 100 shares at 101.00 $/share (1010 $/BTC).

Are they making fun of the market, or what?

http://bravenewcoin.com/news/xapo-moves-headquarters-to-switzerland/


EDIT: As a redditor observed, Sweden is not Switzerland, just as USA is not USB.

Bitcoin Tracker One (BITCOIN-XBT) daily trading summary:

Date       !  PRLO !   PRHI !   VNOT !       VSEK !      SPNX ! SPUX !   UPBX ! OBS       
-----------+-------+--------+--------+------------+-----------+------+--------+-----------
015-05-18  |  9.66 |   9.73 | 189783 | 1837195.92 |   9.68051 | 8.24 | 234.96 |           
015-05-19  |  9.61 |   9.72 | 109376 | 1057572.27 |   9.66914 | 8.35 | 231.60 |           
-----------+-------+--------+--------+------------+-----------+------+--------+-----------

Data from the BITCOIN-XBT page at NetFonds.se.

PRLO = Lowest price in specified day.

PRHI = Highest price in the specified day.

VNOT = Number of notes (shares) traded in day.

VSEK = Trade volume in SEK (sum over all trades of num of notes times price per note).

SPNX = Average note price in SEK for that day = VSEK/VNOT.

SPUX = Assumed SEK/USD currency exchange rate (typically from Google at end of that day).

UPBX = Average implied USD/BTC price ignoring fees = SPNX*200/SPUX

That old ladies are in fact (a notable part of) the Chinese traders and investors who are still determining the price of bitcoin...

I already posted many times this article, that describes the typical Chinese traders and investors who caused the Nov/2013 rally:

Christian Science Monitor 2013-12-06
Why the Chinese can't get enough of Bitcoin - despite bank ban
http://www.csmonitor.com/World/Asia-Pacific/2013/1206/Why-the-Chinese-can-t-get-enough-of-Bitcoin-despite-bank-ban

Every trader should be aware of that information.  Understandably, it is never mentioned by the bitcoin "news" media or the Antonopouloses, Winklegosses, Andreessens, Sielberts, etc..  Do I need to explain why?

A briefer but more specific description of those traders and investors is in that talk by Huobi's Wendy Wang that I posted earlier, around the 00:14:00 mark.

Later in that talk she gives some interesting gossip about the mining situation in China and the mining pool that they manage (Discus Fish, IIRC).

I read the other day an article in a major bitcoin newssite that confused Sweden with Switzerland.  But at least the reporter knew that they are countries, or a country, whatever.  I bet that the old ladies in China who define the price of bitcoin have never heard of either.

Are there any numbers?  Like, "We expect to produce and deploy N zillion chips in the next 5 years, which will increase the total world's hashpower to P mongohashes per second, so that your toaster will mine K thousand BTC every morning, unless you would rather have light toast."

BIT shares (GBTC) daily trading summary:

           !   OTX !   OTX !   FRT !    FRT !    FRT !        FRT !       FRT !     
Date       !  PRLO !  PRHI !  PRLO !   PRHI !   VSHR !       VUSD !      PRAV ! OBS 
-----------+-------+-------+-------+--------+--------+------------+-----------+----------
2015-05-04 | 37.98 | 42.00 |   .   | 200.00 |    765 |        .   |    .      | (*0)(*1)
2015-05-05 | 55.00 | 94.86 | 50.00 | 175.00 |    435 |   32198.00 |  74.01839 | (*0)
2015-05-06 |   .   |   .   | 65.00 |  68.00 |    125 |    8268.50 |  66.14800 | (*0)
2015-05-07 | 40.00 | 66.00 | 40.00 |  86.00 |   2844 |  163651.00 |  57.54255 |     
2015-05-08 | 49.00 | 59.00 | 49.00 |  59.00 |  14807 |  750019.70 |  50.65305 |     

2015-05-11 | 50.00 | 57.95 | 49.50 |  57.95 |   2756 |  143247.34 |  51.97654 |     
2015-05-12 | 49.00 | 50.01 | 49.00 |  52.25 |   2286 |  113299.25 |  49.56223 |     
2015-05-13 | 49.00 | 49.00 | 49.00 |  50.00 |    327 |   16113.10 |  49.27554 |     
2015-05-14 | 44.00 | 49.00 | 44.00 |  49.95 |  20894 | 1004923.74 |  48.09628 | (*2)
2015-05-15 | 38.00 | 45.00 | 38.00 |  45.00 |   2320 |   97444.35 |  42.00188 |     

2015-05-18 | 27.15 | 38.00 | 27.15 |  38.00 |   4950 |  158115.83 |  31.94259 |     
2015-05-19 | 27.90 | 29.50 | 27.89 |  29.90 |   4308 |  122327.92 |  28.39552 |  

"OTX" data from the GBTC quote page at OTCQX.
"FRT" data from the Freerealtime site, except those flagged (*0) and (*1) (see below).

PRLO = Lowest price in specified day.

PRHI = Highest price in the specified day.

VSHR = Number of shares traded in day.

VUSD = Trade volume in USD (sum over all trades of num of shares times price per share).

PRAV = Average price in day = VUSD/VSHR.

OBSERVATIONS:

(*0) The "FRT" price range for this entry was obtained from this post.

(*1) For 2015-05-04, the values of PRLO, VSHR, VUSD, and PRAV could not
be determined; the value of VSHR was taken from the OTCQX page.

(*2) The summary pages at OTCQX and FreeRealTime.com say 19894, but
adding the FreeRealTimes list of trades we get 20894 (1000 more). The
VSHR value given is the latter. There were 2 trades near the end of the
day; perhaps one was undoing the other?

Youtube has an interesting talk by Wendy Wang of Huobi, about their history.  I haven't seen it all yet, but at ~00:14:00 she describes the typical Huobi customer who drove the Nov/2013 bubble.

Netfonds BITCOIN-XBT summary page

Netfonds BITCOIN-XBT trade log page


"Volym" in these Netfonds pages is in notes (similar to the BIT shares;  1 note = ~1/200 of BTC). 

On the NASDAQ page, once again, the "Turnover" is in Swdish crowns (SEK).

Well, minus the fee (2.5 %/year, compounded).