The "PPS" is a very sensitive component in the stock market. It responds quick when it feels rapid movement from the share volume. It jumps upward when it notices high volume even if it actually should have dropped because of the high volume. It takes time for the excited "PPS" to realize there's "no cause for action". That's when it starts dropping where it needs to be unless it learns that there's enough "capital" to support it as it climbs as high as it can go.
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