Greyscale BIT shares (GBTC) daily trading summary:

    Date       ! NTr ! UpS_LO !  UpS_HI !   VSHR !   VBTC !       VUSD !       UpS !      UpB ! OBS      
    -----------+-----+--------+---------+--------+--------+------------+-----------+----------+----------
    2015-05-04 |     |   .    | 200.000 |    765 |   76.5 |        .   |    .      |    .     | (+0)(+1) 
    2015-05-05 |  18 | 50.000 | 175.000 |    435 |   43.5 |   32198.00 |  74.01839 | 740.1839 | (+0)     
    2015-05-06 |   4 | 65.000 |  68.000 |    125 |   12.5 |    8268.50 |  66.14800 | 661.4800 | (+0)     
    2015-05-07 |  45 | 40.000 |  86.000 |   2844 |  284.4 |  163651.00 |  57.54255 | 575.4255 |          
    2015-05-08 |  68 | 49.000 |  59.000 |  14807 | 1480.7 |  750019.70 |  50.65305 | 506.5305 |          

    2015-05-11 |  53 | 49.500 |  57.950 |   2756 |  275.6 |  143247.34 |  51.97654 | 519.7654 |          
    2015-05-12 |  31 | 49.000 |  52.250 |   2286 |  228.6 |  113299.25 |  49.56223 | 495.6223 |          
    2015-05-13 |  10 | 49.000 |  50.000 |    327 |   32.7 |   16113.10 |  49.27554 | 492.7554 |          
    2015-05-14 |  54 | 44.000 |  49.950 |  20894 | 2089.4 | 1004923.74 |  48.09628 | 480.9628 |  
    2015-05-15 |  29 | 38.000 |  45.000 |   2320 |  232.0 |   97444.35 |  42.00188 | 420.0188 |          

    2015-05-18 |  58 | 27.150 |  38.000 |   4950 |  495.0 |  158115.83 |  31.94259 | 319.4259 |          
    2015-05-19 |  39 | 27.890 |  29.900 |   4308 |  430.8 |  122327.92 |  28.39552 | 283.9552 |          
    2015-05-20 |  28 | 29.250 |  32.250 |   4859 |  485.9 |  148652.00 |  30.59313 | 305.9313 |          
    2015-05-21 |  19 | 30.500 |  32.000 |   2882 |  288.2 |   90663.50 |  31.45854 | 314.5854 |          
    2015-05-22 |  28 | 31.900 |  33.100 |   4971 |  497.1 |  160009.60 |  32.18861 | 321.8861 |          

    2015-05-26 |  18 | 31.000 |  32.000 |   1148 |  114.8 |   36623.50 |  31.90200 | 319.0200 | (+3)     
    2015-05-27 |   4 | 30.550 |  32.000 |    404 |   40.4 |   12444.00 |  30.80198 | 308.0198 |          
    2015-05-28 |  13 | 30.300 |  33.000 |   1140 |  114.0 |   35701.40 |  31.31702 | 313.1702 |          
    2015-05-29 |  10 | 31.950 |  33.000 |    463 |   46.3 |   15174.00 |  32.77322 | 327.7322 |          

    2015-06-01 |   8 | 30.570 |  33.000 |   1046 |  104.6 |   33074.57 |  31.62005 | 316.2005 |    
    2015-06-02 |  12 | 28.520 |  33.000 |   1408 |  140.8 |   42462.40 |  30.15795 | 301.5795 |    
    2015-06-03 |  14 | 28.150 |  30.000 |    414 |   41.4 |   12175.30 |  29.40894 | 294.0894 |          
    2015-06-04 |  13 | 28.150 |  29.250 |   1926 |  192.6 |   56194.40 |  29.17674 | 291.7674 |    
    2015-06-05 |   9 | 29.000 |  29.250 |    875 |   87.5 |   25562.55 |  29.21434 | 292.1434 |          

    2015-06-08 |  15 | 28.300 |  29.500 |   1866 |  186.6 |   54570.00 |  29.24437 | 292.4437 |          
    2015-06-09 |   9 | 28.450 |  29.150 |    737 |   73.7 |   21252.80 |  28.83691 | 288.3691 | 
    2015-06-10 |   7 | 29.000 |  29.500 |    796 |   79.6 |   23302.25 |  29.27418 | 292.7418 | 
    2015-06-11 |  12 | 28.500 |  29.250 |   1329 |  132.9 |   38732.15 |  29.14383 | 291.4383 | 
    2015-06-12 |  11 | 28.910 |  29.100 |   1838 |  183.8 |   53257.80 |  28.97595 | 289.7595 | 

    2015-06-15 |  12 | 28.950 |  29.100 |   1156 |  115.6 |   33577.60 |  29.04637 | 290.4637 | 
    2015-06-16 |  33 | 28.500 |  29.100 |   4750 |  475.0 |  137751.33 |  29.00028 | 290.0028 | 
    2015-06-17 |  45 | 28.600 |  30.000 |  21115 | 2111.5 |  615529.90 |  29.15131 | 291.5131 | 
    2015-06-18 |  14 | 28.800 |  29.250 |   1713 |  171.3 |   49733.90 |  29.03322 | 290.3322 |
    2015-06-19 |  10 | 28.600 |  29.100 |   1772 |  177.2 |   50942.20 |  28.74842 | 287.4842 | 

Data from the Freerealtime site, except those flagged (+0) and (+1) (see below).

UpS_LO = Lowest price (USD/share) in the specified day.

UpS_HI = Highest price (USD/share) in that day.

NTr = Number of listed trades in day.

VSHR = Number of shares traded in that day.

VBTC = Number of BTC equivalent to those shares (ignoring fees) = VSHR*10.

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

UpS = Average price in day (USD/share) = VUSD/VSHR.

UpB = Implied bitcoin price (USD/BTC) = VUSD*10/VSHR.

OBSERVATIONS:

(+0) The rice range for this entry was obtained from this post.

(+1) For 2015-05-04, the values of NTr, UpS_LO, VSHR, VUSD, and UpS could not
be determined; the value of VSHR was taken from the OTCQX page.

(+3) Holiday in the US.

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

    Date       !  NTr ! SpN_LO ! SpN_HI !    VNOT !      VBTC !        VSEK !      SpN !  SpU !    UpB ! OBS 
    -----------+------+--------+--------+---------+-----------+-------------+----------+------+--------+-----
    2015-05-18 |  120 |   9.66 |   9.73 |  189783 |   948.915 |  1837195.92 |  9.68051 | 8.24 | 234.96 |     
    2015-05-19 |   77 |   9.61 |   9.72 |  109376 |   546.880 |  1057572.27 |  9.66914 | 8.35 | 231.60 |     
    2015-05-20 |   31 |   9.68 |   9.79 |   90988 |   454.940 |   886232.68 |  9.74011 | 8.35 | 233.30 |     
    2015-05-21 |   18 |   9.74 |   9.79 |  135233 |   676.165 |  1319500.95 |  9.75724 | 8.32 | 234.55 |     
    2015-05-21 |   23 |   9.72 |   9.89 |  128618 |   643.090 |  1259617.61 |  9.79348 | 8.32 | 235.42 |     

    2015-05-25 |   29 |   9.91 |  10.10 |   90759 |   453.795 |   902925.40 |  9.94860 | 8.41 | 236.59 |     
    2015-05-26 |   30 |   9.96 |  10.03 |  151238 |   756.190 |  1512820.76 | 10.00291 | 8.43 | 237.32 |     
    2015-05-27 |   14 |  10.04 |  10.12 |   86275 |   431.375 |   868373.30 | 10.06518 | 8.51 | 236.55 |     
    2015-05-28 |   25 |  10.01 |  10.09 |   72006 |   360.030 |   723643.90 | 10.04977 | 8.48 | 237.02 |     
    2015-05-29 |   28 |   9.98 |  10.04 |  106617 |   533.085 |  1066415.00 | 10.00230 | 8.52 | 234.80 |     

    2015-06-01 |      |    .   |    .   |  119031 |   595.155 |         .   |   .      | 8.54 |    .   | (@1)
    2015-06-02 |   15 |   9.50 |   9.58 |   44950 |   224.750 |   429993.88 |  9.56605 | 8.58 | 222.98 |     
    2015-06-03 |   12 |   9.47 |   9.52 |   56022 |   280.110 |   532896.02 |  9.51226 | 8.41 | 226.21 |     
    2015-06-04 |   10 |   9.34 |   9.38 |  109117 |   545.585 |  1021222.78 |  9.35897 | 8.27 | 226.34 |     
    2015-06-05 |   13 |   9.23 |   9.51 |   58629 |   293.145 |   553229.43 |  9.43611 | 8.34 | 226.29 |     

    2015-06-08 |   10 |   9.36 |   9.50 |   48075 |   240.375 |   450949.80 |  9.38013 | 8.38 | 223.87 |     
    2015-06-09 |   11 |   9.43 |   9.56 |  141025 |   705.125 |  1335575.25 |  9.47049 | 8.30 | 228.20 |     
    2015-06-10 |    9 |   9.47 |   9.51 |  123100 |   615.500 |  1167717.00 |  9.48592 | 8.29 | 228.85 |     
    2015-06-11 |   11 |   9.45 |   9.49 |  163000 |   815.000 |  1545460.00 |  9.48135 | 8.23 | 230.41 |     
    2015-06-12 |   20 |   9.44 |   9.49 |  291000 |  1455.000 |  2753960.00 |  9.46378 | 8.21 | 230.54 |     

    2015-06-15 |   33 |   9.60 |   9.66 |  153477 |   767.385 |  1478796.63 |  9.63530 | 8.18 | 235.58 |     
    2015-06-16 |   67 |   9.73 |   9.96 |  234542 |  1172.710 |  2305594.30 |  9.83020 | 8.18 | 240.35 |     
    2015-06-17 |  135 |  10.21 |  10.57 |  493677 |  2468.385 |  5119212.14 | 10.36956 | 8.18 | 253.53 |     
    2015-06-18 |  112 |   9.88 |  10.17 |  635137 |  3175.685 |  6328464.94 |  9.96394 | 8.10 | 246.02 |     
    2015-06-19 |      |        |        |         |           |             |          |      |        | (@2)
    -----------+------+--------+--------+---------+-----------+-------------+----------+------+--------+-----
    TOTAL      |      |        |        | 3831675 | 19158.375 |             |          |      |        |     
    -----------+------+--------+--------+---------+-----------+-------------+----------+------+--------+-----

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

NTr = Number of trades listed in day.

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 www.xe.com, some time during day).

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

OBSERVATIONS:

(@1) Failed to grab the trades on this day. VNOT from a bitcointalk post.

(@2) Holiday in Sweden, trading closed.

They seem to have 5% of the total hashpower now, so they should be mining 3600 x 0.05 = 180 BTC per day.

However, they are now selling their BTC packaged as "XBT Tracker One" electronic notes, at the NASDAQ Sweden market.  Each note is only an IOU for 0.05 BTC, so when they sell the note the do not have to move any bitcoins.

Those wallets may be where they keep the bitcoins that are supposed to back the notes that they have issued or plan to issue.  The total trade volume of  those notes on NASDAQ-SE so far is ~19'000 BTC, but that includes notes that have been bought and sold many times.  Somewhere in the net (at Bloomberg?) one can find the amount of notes that they have actually issued; but I can't find the URL now.

Volume is very low ad the price has been extremely flat for ~3 hours in the Chinese exchanges. 

That started 12:00 and it is now 15:00, Sunday, in local time.  A soccer match does not last that long... 

I haven't looked very closely at the latest reports, but my conclusions so far are

(1) one cannot understand what happened in MtGOX by analyzing only the data that is available from the database leak -- which, according to the Japanese Police, appears to have been doctored. One would need also, at a minimum, actual withdrawal and deposit records.  The Japanese Police surely has those for fiat; it is not clear whether they have data for BTC too.

(2) my guess as to Willy is that it was doing (probably fraudulent) arbitrage: buying bitcoins from MtGOX clients to in order to sell them in China.  The money that Willy used was probably inexistent -- essentially, unbacked credit provided by MtGOX.  Perhaps the bitcoins had been sold in China or elsewhere earlier, and Willy's purpose only to cover up the embezzlement/theft by turning the missing bitcoins into missing fiat.  Perhaps Willy's owner expected to get the money later somehow.  Who knows. 

(3) But, in any case, Willy does not seem to have been responsible for the Nov/2013 bubble.  Comparison of prices across exchanges shows that the prices in China were higher than in the West (even higher than MtGOX) during the rally, and lower during the Dec/2013 crash; which suggests that the Chinese exchanges were pulling, and the Western ones were lagging behind.

There is a suspicion that the Coinwallet.eu "stress test" is actually a scam:

I believe we have our first scammer organizing a Bitcoin stress test
http://np.reddit.com/r/Bitcoin/comments/3ahl43/i_believe_we_have_our_first_scammer_organizing_a/

There is a suspicion that the Coinwallet.eu "stress test" is actually a scam:

I believe we have our first scammer organizing a Bitcoin stress test
http://np.reddit.com/r/Bitcoin/comments/3ahl43/i_believe_we_have_our_first_scammer_organizing_a/

Is this true?

There is a thread on reddit about it.

Charles Lee (Litecoin's mommy, now at Coinbase) was once asked that in a reddit AMA.  He explained that Coinbase cannot use any of their VC capital for that purpose.  

I am not sure, but there may even be laws in the US that prohibit a startup from using its VC capital for speculation or to invest in other things.  Perhaps because of tax reasons.

It also does not make sense for VC investors to give several million of their money to some computer nerds for them to play the market.  If the VC investor wanted to speculate with his money, he would do it himself, or hire experienced traders.

However a company that wants to start a bitcoin fund may legitimately buy bitcoins.  IIRC, when Tim Draper bought the first batch of USMS bitcoins, he said that they would provide liquidity for a company called Vaurum (that Nick Szabo worked for, BTW) and now has some other name.

Sorry to repeat, but my preferred guess for the cause of the rally was the joint statement of the 5 top Chinese miners that they support an increase of the max block size to 8 MB.  The timing seemed just right...

Won't you agree that those red seals on the agreement document give a long missed feeling of security and confidence in the coin?  Almost like it had the support of the whole Red Army...

[ Here is the English version, BTW. ]

Volume is usually high when the price is changing.  I don know which is cause and which is effect, globally (probably each feeds the other).  But in the case of XBT Tracker One, price variation must be the cause, and trade volume must be the effect.

Has anyone been keeping track of the actual number of notes in circulation?

Are you perchance insinuating that bitcoin may have a central authority that must be trusted?

The top Chinese mining pools (who control more than 60% of the hashpower) have just got together and officially endorsed an increase of the max bock size limit to 8 MB, instead of the current 1 MB. 

http://www.reddit.com/r/Bitcoin/comments/3a0n4m/why_upgrade_to_8mb_but_not_20mb/

The blocksize caper thus seems to be on its way to resolution.  That increase will raise the max throughput to ~20 tx/sec intead of the current ~2.5 tx/sec, and reduce substantially the risk of persistent backlogs, natural or intentional (like the 8-hour backlog created by the 2-hour-long stress test, a coupld of weeks ago).

But the bitcoin price is only bubbles:


[ Click on the image for a full-size version ]

Explanation:
https://bitcointalk.org/index.php?topic=1034430.msg11160620#msg11160620

I am not familiar with the MLP world.  Has there ever been a case of an MLP-fiat exchange swallowing 600'000 of its clients unicorns?  How many megawatts does it take to prevent a pony from being enjoyed by two fans at the same time?

Bitcoin exchanges and (some) bitcoin miners are perhaps the only companies that are actually profitable at the moment.  Even zero-fee exchanges have many other ways of extracting money from their users. Even MtGOX would have made hundreds of millions of dollars of profit, if it wasn't for the mysterious disappearance (or inexistence) of the BTC in its client accounts.

Bitcoiners are such adorable creatures...