The SEC's acceptance or rejection will not have a significant impact on the market
think deeper
the companies applying for SEC acceptance wont cause market changes, as these companies would have already bought their 'baskets' of coins months/years ago. they have to for audit/liquidity reasons of just bing able to apply
but...
once the first ETF gets accepted. it then becomes the precedent/prototype. and then many other new companies will have a template to follow to get easy quick acceptance because they know the first one got accepted for the same thing
thus new companies not yet filing will grab coins, use the first mover as the template and bam its the second movers that will cause a market shift.
this is why many companies are waiting for news of a first mover before doing anything. as its way cheaper to get others to do the hard work, and then just copy the success
its much like an olden times armies. a general sends its first line troops onto a mine field.. stands back and waits for the path to clear, and then follows footprint for footprint only the tracks of the guy that made it to the other side
interesting point.
what you said is more like the long term effects of these things on the price but you are also forgetting about the "hype" of these things in the market. the rejection part had some effects the first couple of times as it created some panic and now it is over since they have rejected/postponed hundreds of times. the acceptance however is going to be new and it can cause a hyped up situation where price shoots up temporarily and at this stage in the market that kind of shoot up can act as a catalyst that starts the rallies sooner.