I have an apt vulgar analogy, however for a G rated version, "
All it takes is 1 robber!" (replace robber with another "r" word).
My memory may be poor and this definitely is not EMR related, however re substantial and non-substantial holdings... I don't recollect "Black Rock" or "Vanguard"... Always State Street cause the SP tanks after (too many other companies to have seen this trend)... I do recollect, Citi and JP, can go either way... But with State Street, "down, down" until they are gone! Good news when they are gone, bad news when they appear*...
It's a pro and con, our profile is relatively low, our register is/was fairly tight(?)...
P.S. The graph, "being" a numbers man"... < 1% to > 4% is > 400% increase!
Look at the top shorted stocks, wk to wk percentage change may not be much, but the damage wk to wk can be massive...
*Now if we all become traders and start dumping when State Street appear, works to their benefit as well (our disadvantage due to the reporting delay)... Where are our regulators?
(20min delay)