For a deeper look into our Eikon Data API, look into:
Overview | Quickstart | Documentation | Downloads | Tutorials | Articles
You can retrieve this data using Refinitiv Data Platform Libraries:
rdp.get_historical_price_summaries(universe='345397XK4=', fields=['AST_SWPSPD'])
We're still building the documentation for these libraries here on this portal. In the meantime you can find examples of using this library in Codebook under Examples/02 - Refinitiv Data Platform Library.