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Can't get correct company for duplicate symbol at a given date
Ken Fehling
edited Jul 25, 2016
Using Data

When I just do symbol('CASC') I get an error which is expected.

There are multiple assets that have used the symbol CASC. You must use  
set_symbol_lookup_date() before using symbol(). The table below shows  
when each company traded using the symbol CASC.

ASSET                           FIRST TRADED        LAST TRADED  
CASCADIAN THERAPEUTICS INC      1993-01-03          2016-07-24  
CASCADE CORPORATION             1993-01-03          2013-03-27

However the dates overlap (the start date for Cascadian Theraputics is wrong) so when I do:

set_symbol_lookup_date('1998-01-01')  
symbol('CASC')

it should return Cascade Corporation (sid 1265) but it returns Cascadian Theraputics (sid 883).

My goal is to bring historical data in using fetcher so I believe I need to lookup by symbol and not sid. Is there anyway that I could remedy this?

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