I am brand new here, but I LOVE the platform. Trying to get my feet wet and figure my way around.  I am trying to pull monthly historical option prices for SPY into the research tool to try some backtesting.  However, I am not understanding how the months are filtered out.  When I request history from June 1, 2017,  I get the following months: Jun, Jul, Aug, Sep, Dec, Jan, Mar  But when I request history from Sep 1, 2017, then I get:  Aug, Sep, Oct, Nov, Dec, Jun, Jul   I dont understand why I am getting those months, how do I get _all_ the months from Jun 1, 2017? 

2nd question:  the last cell of the notebook will hang and the kernel will eventually die.  Any ideas? 

Really appreciate the help! Really excited to get started here! 

TIA, 
Thomas

Author

Thomas cook

September 2018