how to describe this pattern in Leonardo Finmeccanica's share price (observed here)? It is a fairly liquid stock, but the price seems to alternate between ca. 8 and ca 13!!
Does anyone know what could explain this observation?
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Seems like the least interesting pattern of all - data errors at the Yahoo's side. Just checked with Bloomberg - nothing similar is present.
If not a data error, this could be bid-ask bounce (dismissed with here since you mention it's a liquid stock).
