My first hunch is that all scarcity is socially construed. Physical scarcity is 
sort of Malthusian and although due consideration must be given to the subject, 
it does not have the final call. 
I take a Robert Mabro position on this, strictly speaking oil has been 
financialised.
A friend did the below illustration using Hotteling rule.

Table 2: interest rate, oil price expectation, and behavior of producers and 
speculators
 
Case I: Low interest rate and high expected future oil prices Case II: High 
interest rate and high expected future oil prices 
Producer: reduce production
 
Speculator:easy leverage to take long positions. 
  Producer: ambiguous – but high cost of exploration and development investment
 
Speculator:difficult to be leveraged
  
Case IV: Low interest rate and low expected future oil prices Case III: High 
interest rate and low expected future oil prices 
Producer:ambiguous – but low cost of exploration and development investment
 
Speculator:ambiguous  Producer:increase production
 
Speculator:may take short positions.  
 
Table 2 shows the summary of the behavior of producer, according to the 
Hotelling rule, and the financial speculators.  It shows possible two extreme 
cases. One is the case with low interest rate and high expected future oil 
prices (Case I).  In this case, the oil producers have an incentive to reduce 
the output while the speculator could easily take their position to create 
fictitious demand. The amplification of fictitious scarcity may create an 
additional expectation for future price growth, which may create an additional 
incentive for oil producers to reduce the output. The acceleration of this 
process may be stopped by an event such as a hike of interest rate where the 
producer’s discounted value of oil wealth can be changed and/or where the 
speculators’ leverage is dissolved by funding difficulties. Another extreme 
case is with high interest rate and low expected future oil prices (CaseIII). 
In this case, there is an incentive for oil
 producers to increase the output while the speculator cannot take leveraged 
long positions – they may rather take short-positions by short selling. The 
direction of the acceleration of the process can be exactly opposite to Case 
I.  In this case, the process may only be stopped by an event such as a plunge 
of interest rate.


      
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