A renowned hedge-fund honcho hatched a heinous revenge plot against his former mistress by posing as her on the Internet – saying she wanted to be kidnapped and raped as part of a sicko sex fantasy, officials said yesterday.

Albert Hsu, 43, a wealthy, married dad of two and former Cub Scout leader, posted his fiendish ad on a hardcore, S&M Web site, Connecticut authorities said.

He allegedly included the woman’s name, photo, address, license-plate number, train schedule to and from work and even the rail car she usually sits in.

“The defendant set the victim up to be abducted and raped by a complete stranger,” prosecutor Ricki Goldstein said in Norwalk, Conn., Superior Court.

Hsu, who co-founded Anchor Point Capital in New York City after overseeing billions in investments for everyone from Xerox to Atlantic Philanthropies, meticulously planned the scheme down to the last detail, officials said.

Posing as his ex in the “ad,” he allegedly begged anyone responding to not contact her or give her a head’s-up before the attack because it “would ruin the fantasy” for her.

His motive appeared simply to be pure “hate,” Goldstein said.

She said Hsu had already lined up one potential attacker and has confessed to the crime.

The investor was held in lieu of $750,000 bond after being busted Friday, but a judge jacked up the amount to $1 million at his arraignment yesterday.

The slightly built Hsu appeared extremely grim-faced and hunched over in court. He sported tailored pants, a pricey, button-down, powder-blue shirt, a gray cashmere sweater – and shackles.

His evil plan came to light after his unidentified victim alerted authorities to the terrifying posting about her on http://www.collarme.com Feb. 26, authorities said.

“We acted on it as quickly and as urgently as we could to protect the safety of the victim,” said police Lt. David Bender of New Canaan, where Hsu lives. “We felt she was in grave danger.”

Hsu was charged with attempted kidnapping, attempted sex assault, criminal impersonation and other raps, officials said.

The money man’s court-appointed lawyer, Dawn Bradanini, said her client was “thoroughly embarrassed by this.”

She asked for a lower bond “based on the lack of history of a serious nature.”

Goldstein said Hsu had previously been charged with assaulting his wife. A bail official added that he has a history of mental problems and is on medication . He was placed on suicide watch.

News of Hsu’s bizarre bust stunned his community and colleagues, who heralded him as one of the nation’s leading, most quotable authorities on hedge funds.

“Albert is absolutely the last man in America you would expect to do anything wrong, let alone anything like this,” one rival trader said.

“He is incredibly smart and polite, the type of guy you’d like as a partner and a neighbor.”

Matt Crowe, the son of Hsu’s partner at Anchor Point, declined to comment when asked if anyone at the firm had noticed a recent change in the suspect’s behavior.

“We only know what we’ve read,” he said.

Hsu, who attended the prestigious Bronx School of Science, lives with his wife – a management consultant – and young son and daughter in a ritzy home.

With Post Wire Services

jana.winter@nypost.com