[gumby]

TBF the four authors have names that appear to be Italian and German. They acknowledge the contribution of someone who provided DAX data (German stock index, like the CAC or Dow). And lots of subordinate clauses are common in written German, or at least a lot more common than in English.

So while I agree the sentence is rather contorted, there is a sympathetic explanation. Especially as the authors claim no institutional affiliations.

I don’t think such a sentence would be justified coming from an institution in an English-speaking country.