3600 are produced daily I think....
And it is only a small fraction of total exchange volume.
According to blockchain.inf/markets, bitstamp has ~$9.5 million in trades in the last 24 hours, with bitcoin trading at ~$400, that works out to ~24k bitcoin in the last 24 hours. The amount mined per day is roughly 15% of that figure. Taking away 15% of the supply of a product would almost always have an impact on the price
According to Bitcoinity (
http://bitcoinity.org/markets/list), the total traded in the last 24 hours on all exchanges was 484k. Bitstamp's 25k is a little more than 5% of the total exchange volume. 3600 BTC is only 0.75% of the total exchange volume, and don't forget that 3600 assumes that
all mined bitcoins are sold.
Anyway, my point is not that the price is unaffected by newly mined bitcoins. Of course it is. It's basic inflation of the money supply. I just don't think it is the major cause of the steep decline over the last 9 months.
Mining has increased the number of Bitcoins over the last year from about 12 million to about 13.5 million. The increase is about 13%, so from a mathematical standpoint, inflation can account for only a decline in the price by about 11%.