For many market participants, the flash crash of May 6, 2010 — in which the Dow Jones Industrial Average plunged nearly 600 points and then quickly bounced back — remains a touchstone, invoked after each subsequent market glitch, from the botched IPOs of Facebook and BATS Global Markets to Knight Capital’s rogue software.

The crash brought into stark relief some of the risks and dangers of high-speed trading in today’s highly interconnected markets and revealed the limitations of regulatory oversight at the time for algorithm-based and high frequency trading activity. But after a joint investigation and report into the crash by the Securities and Exchange Commission and the Commodity Futures Trading Commission, many argue that the true story of the flash crash remains untold.

One vocal example is Dutch filmmaker Marije Meerman, whose documentary on the crash, entitled Money & Speed: Inside the Black Box, originally broadcast on Dutch television, is now available as an English-language version on YouTube. According to Meerman, though the documentary was first released in January 2011, several months after the flash crash, it raises questions that remain relevant today: Why did the SEC/CFTC report conclude that just one firm (later named as Waddell & Reed) was responsible for the trading that caused the crash, when a more minute analysis shows contrary findings? Who was buying at the absolute bottom of the market during the crash? And could a flash crash be deliberately engineered to create arbitrage opportunities from today’s lopsided technical infrastructure, allowing some firms to get market information before others?

“I thought information about this event would be made clearer so much sooner,” Meerman tells Institutional Investor.

To try to revisit the events of the flash crash, the film — approximately 50 minutes in length — uses a combination of striking visuals, colorful data, edgy music and interviews with market players including Rishi Narang, founder of California-based quant firm T2AM; technology historian George Dyson; Gregg Berman of the SEC’s Division of Trading and Markets; Paul Wilmott, a consultant and lecturer in quantitative finance; Willam Black, an associate professor of economics and finance at the University of Missouri; and Eric Hunsader, founder of Winnetka, Illinois–based market data firm Nanex.

One of the key moments in the film comes from Nanex’s Hunsader, who challenges the government report’s attribution of blame for the May 6 market drop. Drawing from his own data, Hunsader claims the two agencies got it wrong by failing to analyze the data on a millisecond-by-millisecond basis. He points out that their report aggregates information in chunks of time too big to give a full and accurate picture of events surrounding the crash. “The time stamps hid the delay,” Hunsader says in the film, and he goes on to cast doubt on the report’s conclusion that just one firm was responsible for the crash.