Arcam AB fka AMAVF

[TheCleos]

AMAVF AB vs. Arcam.st? I purchased AMAVF (Arcam AB) stock from my Fidelity Brokerage account over a year ago. Still not sure how these two "stock listings" relate to each other. They don't go up/down by the same percentages? Is that a function of exchange rates? Also different number of total shares sold listed each day? I called Fidelity to get a better understanding of the relationship between the two, but still not clear how the two listings relate to each other. Does it make any difference to a retail investor which version one owns? I suspect not .. but still curious. Anybody have any insights. Just trying to understand how this works.

Actually my main reason for this post is my observation that the listing I own (AMAVF) trades fewer than 20,000 shares a day. Does this mean that US based investors trade fewer then 20,000 shares a day? If this is the case, then this stock really is thinly traded and would help explain why this company could be said to be underappreciated by the market. Or can US based investors buy and sell shares of Arcam.st? Help.