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ESRCF
ESR CAYMAN LTD
stock OTC

Inactive

Jan 31, 2025

1.55USD+2.649%(+0.04)340

Pre-market

0.00USD-100.000%(-1.51)0

After-hours

0.00USD0.000%(0.00)0

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ESRCF Reddit Mentions

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ESRCF Specific Mentions

As of Aug 9, 2026 1:02:11 AM EDT (<1 min. ago)

Includes all comments and posts. Mentions per user per ticker capped at one per hour.

373 days ago • u/traveler9210 • r/algotrading • 403_errors_for_random_stocks_on_interactive • C

My friend, it seems like ESRCF got delisted
https://sg.finance.yahoo.com/quote/ESRCF/history/
You could have a pre-step in which you check what ticket is good to go and what isn’t.

373 days ago • u/iqzium • r/algotrading • 403_errors_for_random_stocks_on_interactive • Data • B

The IB client portal API has an endpoint trsrv/stocks which accepts a comma separated list of symbols and returns a JSON that has exchange and conid information for each symbol.
Interactive Brokers doesn’t give you a list of supported symbols programmatically, so I get this list from elsewhere then pipe them into this endpoint so I can see which stocks are supported for my algorithm.
A normal, valid symbol (e.g. AAPL) will return a JSON structure.
An invalid symbol (e.g BLAHBLAH) will return an empty JSON element.
However I’m finding that there are some symbols which return 403 errors. This complicates processing because you pass \~100 symbols through a single API call and the whole call returns with a 403 because of one symbol.
Did anyone else encounter this? Is there a way to work around it without hardcoding? Some examples are ESRCF and FSRCY. I’ve opened a bug report with their team last month but haven’t heard back beyond they will look into it with their security team and to ignore these symbols.

373 days ago • u/traveler9210 • r/algotrading • 403_errors_for_random_stocks_on_interactive • C

My friend, it seems like ESRCF got delisted
https://sg.finance.yahoo.com/quote/ESRCF/history/
You could have a pre-step in which you check what ticket is good to go and what isn’t.

373 days ago • u/iqzium • r/algotrading • 403_errors_for_random_stocks_on_interactive • Data • B

The IB client portal API has an endpoint trsrv/stocks which accepts a comma separated list of symbols and returns a JSON that has exchange and conid information for each symbol.
Interactive Brokers doesn’t give you a list of supported symbols programmatically, so I get this list from elsewhere then pipe them into this endpoint so I can see which stocks are supported for my algorithm.
A normal, valid symbol (e.g. AAPL) will return a JSON structure.
An invalid symbol (e.g BLAHBLAH) will return an empty JSON element.
However I’m finding that there are some symbols which return 403 errors. This complicates processing because you pass \~100 symbols through a single API call and the whole call returns with a 403 because of one symbol.
Did anyone else encounter this? Is there a way to work around it without hardcoding? Some examples are ESRCF and FSRCY. I’ve opened a bug report with their team last month but haven’t heard back beyond they will look into it with their security team and to ignore these symbols.

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