By Herbert Lash

NEW YORK, Oct 12 (Reuters) – A new study about May’s “flash crash” casts doubt on two basic premises of high-frequency traders: that they help markets function properly by providing liquidity and that they smooth out price volatility.

High frequency traders have pointed with glee to the fact a mutual fund company, identified as Waddell & Reed Financial Inc, helped trigger the steep market plunge on May 6, as outlined by U.S. regulators in a report almost two weeks ago.

Yet the new study by staff of the Commodity Futures Trading Commission to be unveiled on Tuesday not only gnaws at the service high-frequency traders claim to provide but says their response to that day’s slide sparked greater volatility. (more…)