In principle, yes. That's why I've said for a while now, in opposition to some of the uberbulls, that if truly big capital wants to enter, they will probably do so off-exchange, by contractually binding large mining operations' outputs to themselves. That might still leave traces in the overall supply situation and have some effect on on-exchange prices, but probably be less of an impact than if they'd outright buy the same amounts on-exchange.
Anyway, the above is conjecture: it's only to point out why it is possible that big capital is entering a substantial position without us noticing directly that this is happening.
SecondMarket buys are publicly visible (or at least: the outcome is visible publicly, we don't know where and how they're getting their orders filled), that much is clear. So the psychological effect (if it exists) does apply.
But maybe I misunderstood the question?
*insulting garbage*
dont mess with oda. he is smarter than you by several orders of magnitude.
The third time now! 
