Morgan Stanley shares fell probably the most in 5 months after a report {that a} cadre of US regulators are scrutinizing the agency’s efforts to stop potential cash laundering by rich shoppers.

The Securities and Trade Fee, the Workplace of the Comptroller of the Forex and different Treasury Division workplaces are digging into whether or not the New York-based financial institution has finished sufficient to research the identities of dangerous shoppers, the Wall Road Journal wrote, citing unidentified individuals aware of the matter. The Federal Reserve was already identified to be trying into these controls final yr.

The inventory fell 5.3% to $86.84 throughout common buying and selling in New York on Thursday, its greatest drop since mid-October. A Morgan Stanley spokesperson declined to remark.

The SEC and the Treasury’s Monetary Crimes Enforcement Community have sought info on sure shoppers exterior the US who’ve raised crimson flags and the financial institution’s insurance policies to handle it, the Journal mentioned. Particularly, the SEC pressed Morgan Stanley about why it did enterprise with some who had been lower off by E*Commerce, the digital-trading platform the corporate acquired.

The inquiries, which haven’t been publicly disclosed by the financial institution, concentrate on a wealth administration arm that has swelled into Morgan Stanley’s greatest enterprise, producing nearly half of the corporate’s income final yr. The US authorities has been ramping up strain on the business to tighten money-laundering controls as authorities make larger use of sanctions.

The financial institution has informed regulators it’s enhancing controls and procedures and met with Federal Reserve officers to allay considerations final yr.

The OCC additionally despatched the agency a proper warning final yr, often known as a matter requiring consideration, demanding executives tackle its considerations, based on the Journal. That adopted an annual examination of the financial institution’s anti-money-laundering packages, and a doc reveals the financial institution despatched the regulator detailed plans for motion, the publication mentioned.

Regulators have issued MRAs with larger frequency in recent times. When considerations are deemed extra pressing, in addition they difficulty issues requiring rapid consideration. Such notices are usually flagged to the board and generate a reply together with a time line for corrective motion. Deeper investigation or enforcement motion could comply with if officers are dissatisfied.

(Updates inventory’s decline, provides background on regulatory considerations from first paragraph.)