INDIAN REGULATORS speak with a little more flamboyance than their peers. On July 4th the Securities and Exchange Board of India (SEBI) accused Jane Street, a trading firm, of perpetrating a “sinister scheme” of manipulation in the country’s manic options market. In a lengthy document, it concluded that “the integrity of the market, and the faith of millions of small investors and traders, can no longer be held hostage to the machinations of such an untrustworthy actor.”