Timeline for Do companies' Reuters Instrument Codes (RICs) change over time?
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| Jun 30, 2019 at 3:24 | comment | added | Chris | @Esperanta, that's probably in part because there isn't a 'right' answer for what you're encountering. What I mean is you'll see which securities don't map over time. Using tickers as primary keys can be challenging because different vendors may have different versions (eg, ticker, ticker+exchange, ticker+assorted info) which can make mapping a headache. A CUSIP is always a CUSIP. Even with SEDOLs, the biggest complication is whether the check digit is included or not, which is easy enough to account for. | |
| Jun 26, 2019 at 13:00 | comment | added | Esperanta | I did not accept the answer because it seems a bit general to me (maybe my question was also general). For example: "it will become clear soon enough where there are gaps that need to be accounted for", what do you mean by this? Actually what I am a bit worried about is that I won't notice wrong links. Also, you say that I should link RIC with ticker, but that it would be better to use something non text based, so how do I combine the two? Thanks for the reply anyway! | |
| May 22, 2019 at 21:57 | history | answered | Chris | CC BY-SA 4.0 |