If you are looking for a downloadable .txt or .csv file containing this index of 300 Hindi words, many educational repositories host a index.txt file; use the search string "index of" hindi 300 words filetype:csv .
ऐतिहासिक पृष्ठभूमि (Historical background) index of 300 hindi
While the "Nifty 50" (top 50 companies) is the most famous, broader indices like the represent approximately 90% of the free-float market capitalization of all listed stocks on the NSE. If you are looking for a downloadable