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Thanks to yesterday, we can update this to the equivalent of both a Corvette Grand Sport convertible and Mazda Miata in ‘18.

Oil & gas stocks got hammered (2.7 to 3.4 percent single day losses).

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Originally posted by sjtill:
Wish we had a word of wisdom today from JAllen.

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Today, quantitative hedge funds, or those that rely on computer models rather than research and intuition, account for 28.7% of trading in the stock market, according to data from Tabb Group--a share that’s more than doubled since 2013. They now trade more than retail investors, and everyone else.

Add to that passive funds, index investors, high-frequency traders, market makers, and others who aren’t buying because they have a fundamental view of a company’s prospects, and you get to around 85% of trading volume, according to Marko Kolanovic of JP Morgan .

“Electronic traders are wreaking havoc in the markets,” says Leon Cooperman, the billionaire stock picker who founded hedge fund Omega Advisors.

Behind the models employed by quants are algorithms, or investment recipes, that automatically buy and sell based on pre-set inputs. Lately, they’re dumping stocks, traders and investors say.

“The speed and magnitude of the move probably are being exacerbated by the machines and model-driven trading,” says Neal Berger, who runs Eagle’s View Asset Management, which invests in hedge funds and other vehicles. “Human beings tend not to react this fast and violently.”