I get puzzled by numerous comments I have seen here and on other threads stating that nothing happened on the last halving!!!! My memory was that bitcoin went wildly bullish during the last halving. In order to remind myself which version is right and satisfy my curiosity I decided to look it up.
The last halving was on 28th Nov 2012 when block reward halved from 50 btc to 25 btc
http://www.prlog.org/12032578-bitcoin-community-celebrates-halving-day.htmlI've marked that event on this chart with this orange vertical line
edit: Improved chart
OK it didnt go boom and do a price doubling on that exact day but really look at the price how it was rising to unfathomable new highs just afterwards.
This looks like a massive speculative bubble followed by correction and only eventually after a long time true price starting to be known.
I think next halving is not priced in but again most likely there will be a huge speculative bubble.
Litecoin was similar recently except the speculative bubble was sooner. My conclusion is that we are likely on the cusp of another huge speculative bubble. Only much later after bubble has deflated will new bitcoin supply be truely priced in.
Except Litecoin only hit 20% of it's ATH!
On the question "is it priced in?" I think a close to real value is priced in. What is not priced in, is speculation on what others speculate. What I mean is that you have speculators that think imminent doubling from whatever price it is, at the time (Speculator-A). Then you have speculators that don't give a rats ass as long as there is movement (Speculator-B) and knowing that others think there will be movement. The latter being the ones who actually move the price later since all the ones that "guarantee" it will go up have already bought. The ones who know there will likely be a pump just because it did last time (Speculator-C) have also front run the halving, effectively removing a large amount of buying force from the event (A + C). Does this mean it will rally, but not as much as most believe? It's hard to say yet, but it's also an event that is similar to a triangle consolidation.. Since we know how it worked out last time, this time should be the same. However, every oscillation weakens from the last because of front running and thereby limiting the remaining driving force.
Speculators A and C are (or will be by the halving) out of the game in that they will provide no measurable pressure for any rise due in part or in full of the halving. Speculator-B will be the ones that actually create the rally based on what they speculate others are doing. This may have a muted effect on any halving rally we get since they aren't going to buy it all the way to $30k so the rest can get rich.
Basically, I agree with af in that the speculative bubble is not actually the pricing in of the halving. The true price is only after the price jump (or lack thereof) and subsequent decline, but I think that this halving will have less effect than the previous one, and will be stronger than the next.