Cheng, S. F., De Franco, G., Jiang, H., & Lin, P. (2019). Riding the blockchain mania: Public firms’ speculative 8-K disclosures. Management Science, 65(12), 5901-5913. https://doi.org/10.1287/mnsc.2019.3357
Recently, Cheng et al. (2019) has shown that publicly-traded firms that mentioned speculative blockchain-related in their 8-K disclosures enjoy a positive but transitory stock price increase. Here, we replicate their search procedure using conference call transcripts.
# Search endpoint ("API")
url = "https://conferencecall.search.windows.net/indexes/earnings/docs";
# Blockchain-related conference calls contain:
search = "bitcoin OR blockchain OR cryptocurrency";
# Count results by Reuters Instrument Code up to Top-10 firms
facet = "Derived/MostRelevantRIC, count:10";
# Include only U.S.-based firms in the search
filters = "Derived/GeographyName/any(country: country eq 'United States')";
apikey = credentials are available from the author (required)
api-version = version of the search endpoint (required)
httr = reads content from the web service specified by url and the query parameters and returns the content in data.
library("httr")
data = GET(url, query=list("api-key"=apikey, "api-version"="2020-06-30",
"search"=search, "facet"=facet, "$filter"=filters))
library(jsonlite)
content(data,as="parsed")$`@search.facets`$`Derived/MostRelevantRIC`%>%bind_rows
| count | value |
|---|---|
| <int> | <chr> |
| 31 | OSTK.OQ |
| 17 | BR.N |
| 16 | GROW.OQ |
| 13 | AMD.OQ |
| 12 | MA.N |
| 12 | SQ.N |
| 11 | SRTI.PK^A20 |
| 9 | CME.OQ |
| 9 | NVDA.OQ |
| 8 | CBOE.Z |