probably, too many sharks are competing for a little sardine.
http://www.marketwatch.com/story/why-trading-volume-is-tumbling-explained-in-5-charts-2014-07-07
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High-frequency traders are less dominant
Here’s one possible reason why trading volume is down: High-frequency traders remain a huge force, but they’re not powering turnover quite as much as they used to.
This type of trading, which relies on getting information and prices microseconds faster than the next trader, now accounts for 48.5% of overall U.S. stock-market volume, down from 61% in 2009, according to estimates from Tabb Group, a research and advisory firm.
High-frequency trading “added volume when there was more volatility in the market, but as volatility decreased and stabilized, HFT also decreased,” said Garrett Nenner, managing director at Rosenblatt Securities, which provides market structure analysis, in an interview.
Certain HFT strategies that thrive on volatility just aren’t as active today, as a key gauge of volatility touches a
seven-year low. Is this a permanent retreat by speedsters, who have gained notoriety thanks to books like “Flash Boys” and “Dark Pools”?
It’s likely temporary, said Sayena Mostowfi, a Tabb Group senior analyst. While regulation might at some point have an effect, it’s not a driver for now, she said. “The two drivers that I would point to would be volatility and seasonal effects,” such as the summer trading lull."