Getty ImagesThe U.S. securities regulator has actually opened a questions into Wall Streets blank check acquisition frenzy and is looking for info on how underwriters are managing the threats involved, stated four people with direct understanding of the matter.The U.S. Securities and Exchange Commission (SEC) in current days sent out letters to Wall Street banks seeking info on their unique purpose acquisition company, or SPAC, dealings, the 4 people said.SPACs are listed shell companies that raise funds to obtain a private business with the purpose of taking it public, permitting such targets to avoid a traditional preliminary public offering.The SEC letters asked the banks to offer the info willingly and, as such, did not increase to the level of a formal investigative need, two of the sources said.However, one of those 2 individuals stated letters were sent by the SECs enforcement division, suggesting they might be a precursor to an official investigation.This person said the SEC desired information on SPAC offer charges, volumes, and what controls banks have in location to police the offers internally. The craze has actually started to meet with higher investor apprehension, and has actually likewise caught the eye of regulators.This month, the SEC warned financiers against buying into SPACs based on celebrity recommendations and stated it was closely watching SPAC disclosures and other “structural” SPAC issues.Investors have sued 8 companies that combined with SPACs in the very first quarter of 2021, according to information compiled by Stanford University. Some of the lawsuits declare the SPACs and their sponsors, who enjoy big pay-days as soon as a SPAC integrates with its target, hid weaknesses ahead of the transactions.The SEC may be worried about the depth of due diligence SPACs perform before getting possessions, and whether substantial payments are totally revealed to financiers, said a third source.Another possible concern is the increased danger of expert trading in between when a SPAC goes public and when it reveals its acquisition target, the second source added.