Economodulation

Stock price is going up for several days in a row.
I am hoping it is not short-term like PTP, but rather it continues for a longer term like LTP.

I know that just a single bad news can negate this sustained increase and immediately brings it down to the bottom or the basal level, just like DSI does on VSI-VFN synapse.

One good news can produce a transient increase in stock market, just like DSI does.
I call it "heteroeconomic facilitation."
The effects of a breaking news is bidirectional, sometimes biphasic, depending on the timing and state of the market.

Unlike synaptic strength though, the problem in market price is that we don't know where the bottom lies.

Reference: Sakurai and Katz (2009)