(Bloomberg News) Knight Capital Group Inc. received a $400 million cash infusion through the sale of convertible securities after trading losses spurred by a software failure drove the market maker to the brink of bankruptcy.

Investors agreed to buy preferred stock that will be convertible into about 267 million common shares, the company said today. Getco LLC, an automated trading firm, Blackstone Group LP, brokerages Stifel Nicolaus & Co. and TD Ameritrade Holding Corp., and the investment banks Stephens Inc. and Jefferies Group Inc. are investing, according to a statement.

Knight, whose market-making unit executes about 10 percent of U.S. shares, has been fighting for survival since a computer malfunction spewed orders through exchanges Aug. 1 and led to a $440 million loss. The mishap spurred calls in Congress to examine whether increasing automation is damaging markets.

"It's not too surprising that among the sources of financing for Knight in their emergency are some of their customers," David Whitcomb, founder of Automated Trading Desk LLC, a competitor of Knight owned by Citigroup Inc., said in a phone interview from Honolulu. "Their customers want to keep a diverse set of market makers going so as to maintain a high level of competition."

Share Decline
Knight shares slumped 25 percent to $3.05 as of 10:23 a.m. in New York. The new preferred stock may be converted into common shares at a price of $1.50 a share, compared with the closing price of $4.05 on Aug. 3.The new investors in Knight will own about 73 percent of the company once the 2 percent preferred shares are converted into stock, according to calculations based on Bloomberg data.

Knight said in today's statement that while the issuance of the convertibles would normally require shareholder approval, its audit committee determined that the delay would "seriously jeopardize the financial viability" of Knight.

"We recapitalized the company in a moment of stress and that's why we didn't have a chance to communicate as well as we would have liked," Chief Executive Officer Thomas Joyce said in an interview on CNBC. Joyce said he had a "frank" conversation with Securities and Exchange Commission Chairman Mary Schapiro after the trading glitch.

"We need to remember the SEC's job, and this is hard for me to say, is not to save Knight Capital Group, it's to make sure there's no systemic risk to the industry," he told CNBC. "And you know what? They did their job."

Biggest Partners
While owners of Knight stock saw the value of their shares shrink after a 61 percent plunge last week, the bailout averted a threat to the equity market where it is one of the biggest partners for smaller traders. The company accounted for 29 percent of the average monthly volume in the U.S. by individuals in the first quarter, according to a June 7 presentation.

The dilution to its equity leaves "very little" for existing shareholders, while likely ensuring the company's survival, according to analysts at JPMorgan Chase & Co., who predicted Knight eventually may be broken up.

"We expect investors will look to value the KCG pieces, expecting the parts to be divested at more opportunistic times," the JPMorgan analysts wrote in a note.

Equity Wholesaling
Knight is the dominant firm in equity wholesaling, the business of executing orders off exchanges primarily for retail brokerages, according to Larry Tabb, chief executive officer of research firm Tabb Group LLC in New York.

Stifel Nicolaus sent 38 percent of its market orders in New York Stock Exchange-listed shares to Knight last quarter, and TD Ameritrade did 9 percent, according to a public execution disclosure statement.

The New York Stock Exchange and NYSE MKT temporarily switched custodial responsibility for approximately 524 NYSE and 156 NYSE MKT-listed securities from Knight's designated market maker unit to Getco, according to a statement today. The securities will be returned to Knight after the completion of its recapitalization plan.

"We did it because there was question about whether Knight would reach a deal," Larry Leibowitz, chief operating officer at NYSE Euronext, said in a phone interview. "We didn't want to walk into Monday and have there be any doubts."

Obtaining capital to fund businesses such as market making was viewed as necessary to keep Knight afloat. Analysts at CLSA Credit Agricole Securities wrote last week that bankruptcy was a possibility if the firm failed to get financing.

Cash Overwhelmed
Knight's trading loss was bigger than the $365 million cash balance it reported as of June 30 and exceeded its market value of $398 million as of Aug. 3, data compiled by Bloomberg show.

The sale of convertible securities dilutes existing shareholders because they can be exchanged for stock at a preset price. The deal allows investors to buy new shares in Knight at about $1.50 apiece.

Knight worked with advisers to line up financing after its shares plunged 75 percent over two days last week to $2.58 in the biggest drop since it went public in 1998. The stock climbed 57 percent the next day to $4.05 as some customers said they were routing stock orders back to the firm.

'Confidence Inspiring'
"This is a confidence-inspiring group, so that's a good thing to begin with," Michael Holland, chairman of New York- based Holland & Co., said in a phone interview. His firm oversees $4 billion. "These businesses really fund overnight. If you don't have the confidence, you don't have the funding."
The share decline brought the company's market value to $253 million on Aug. 2, compared with a peak of $4.8 billion in 2000, data compiled by Bloomberg show.

Knight turned to Goldman Sachs Group Inc. on Aug. 1 to buy the firm out of trading positions acquired when a computer program malfunctioned, a person with knowledge of the matter said. It has until the close of business today to complete the transaction.

Knight's computers flooded the market with unintended trades on Aug. 1, sending dozens of stocks into spasms. The fault caused shares to swing as much as 151 percent and left the firm with a "large error position," Joyce told Bloomberg Television's "Market Makers" program with Erik Schatzker and Stephanie Ruhle last week.

Net Income
Before the trading error, Knight posted an 81 percent drop in second-quarter net income after saying it lost $35 million in Facebook Inc.'s initial public offering. Revenue from the market-making unit dropped 52 percent last quarter in the third straight decline.

The software malfunction was the latest black eye for the computer infrastructure of an equity market still haunted by the May 2010 market crash, Facebook's botched share offering, and the failed IPO of Bats Global Markets Inc.

MF Global Holdings Ltd., the holding company for the broker-dealer run by ex-Goldman Sachs co-chairman Jon Corzine, filed the eighth largest U.S. bankruptcy in October, days after a $6.3 billion trade on its own behalf on bonds of some of Europe's most indebted nations led to credit downgrades and margin calls.

Schapiro, whose agency in Washington is the main market overseer, described the Knight event as "unacceptable," and promised to issue regulations to help prevent similar mishaps.

Representative Maxine Waters of California, a senior Democrat on the House Financial Services Committee, said the panel should hold hearings to get to the bottom of the turmoil.

Market Drumbeat
"With a drumbeat of financial market snafus continuing, it's clear that the industry, with guidance from regulators, needs to strengthen their internal controls," Waters said.

Knight's investment came one day after the death of John Phelan, the former chairman and president of the New York Stock Exchange, who warned of an equity market "meltdown" spurred by trading technology one year before the crash of October 1987.

"From an overall market perspective, it would be helpful to not have yet another firm blow up," Walter Todd, who oversees about $930 million as chief investment officer of Greenwood Capital in Greenwood, South Carolina, said in a telephone interview. "If they can come in and structure a deal to allow the firm to continue to operate and eventually get back on its feet, that's a better outcome for the market."