there is no evidence it ever dropped
long gaps between blocks (which is the only thing that definitely happened) are random. finding new blocks is
probabilistic, not mechanistic. That means there is natural variability in how fast new blocks are solved, and natural variability can easily account for the tiny drop that happened for only a few hours on September 23rd.
If this isn't a whole load of bullshit psychological price manipulation, how come the price didn't react until Sep 24th, over 24 hours later?
because it is, if you panic sold, you've been mugged
1. the time gap between blocks does not prove or disprove hashrate speed.
hashrate is based on speed and time. so even if say blocks done 600,000exa every 10 minutes (100ex/sec)
another pool can find a block in 6 minutes(400,000exa) but not broadcast it straight away, thus although the hash is 400k exa. the time shows as 10 minutes not 6 minutes because of the broadcast being late. thus appears to others as only ~60exa/s
thus giving a pool 4 minutes head start for the next block before anyone even knows there is a solved block
(yes pools have don this before and will do this again. although personally id say holding off for minutes is risky)
2. also the reason why there would be delay from hashrate drops to their being a price drop can be for several reasons
a. the 100block reward maturity = not able to spend coins instantly
b. the price unrelated to rewards of day, but traders fearing a scare, so reacting in a self fulfilling prophecy to cause the scare
c. the delay bing due to that not all traders watch hashrate but do watch news alerts, and news took time to notice and report