However, I believe there is another effect, and it's that an increase in profit margin is bullish because miners can afford to speculate with a larger portion, ie hold them. Currently, the profit margins are of course rapidly decreasing due to sideways/downwards price action and still skyrocketing difficulty. My assumption is that the percentage of the daily mining subsidy (3600 BTC) that is released to the market is increasing because the costs that have to be covered are rising.
This is an interesting view, if more people join the mining operation, their profit margin will shrink and create a downward pressure on the price. But this is under the assumption that they have no fiat money to cover their cost, actually many people are converting their fiat into bitcoin in this process
IMO, price is always a leading indicator for fundamentals, the reason price increased so fast at the beginning of this year is because of reward halving and difficulty rise caused by ASIC devices. Just after Avalon batch 1 delivered, the price erupted. Many investors start to quit mining and buy coin directly (Because there is no way to get a ASIC device in a reasonable time frame)
Currently most of the investment money is going into ASIC device order, there are less support for the exchange price, but soon after the number of ASIC devices reaches 36000, average per device return will drop to 0.1 coin per day, at that stage investors will have no other choice but buy coins
Anyone has any data pointing to a reverse relationship, where hashrate would be driving price?
Hashrate has an effect on price, no doubt about it.
During the time between October 2010 and March 2011 Hashrate drove up price. (Contrary to Frozenlock's observation) The first publically available GPU mining software came online during this time Difficulty increasing changed the CPU miner's landscape, demand to buy XBT drove price to $1USD. ( a growth stage)
Price fell as mining supply and demand equilibrium was reached. (a development stage)
Once GPU mining was established, Price Drove up Hashrate. May and June of 2011.(consistent with Frozenlock's observation.) (a growth stage, followed by a falling price and a development stage)
November, December 2012 ASICs were in-house being tested, Hashrate increasing - no notable effect on price. (Consistent with Frozenlock's observation.) (still part of the development stage)
Mid January, Avalon ships first ASIC, Prise starts accelerating. Anticipation of increased Hashrate, drove up demand and Price (contrary to Frozenlock's observation) but consistent with March 2011 Hasrate increasing driving price. (a growth stage)
We are in a consolidation stage mining supply and demand equilibrium is being reached, (development stage) once an equilibrium is reached,
(the manipulators "conspiracy" will pump up the next run when the price of ASIC's has fallen and a market balance between mining and XBT profitability is reached. ) Also relevant is XBT 7200 per day were being created relative to trade volume. And now we have XBT 3600 being created and relatively higher trade volume, but another order of magnitude on Hashrate. (Result is new dynamic in distribution - arguably "stronger hands", or risk takers who believers in Bitcoin as opposed to profiteers utilising existing hardware)
Once the full magnitude of halving and supply and mining production is in balance sometime after all ASIC's Avalon, Butterfly Labs have shipped and ironed out bugs, we'll see another growth stage.