The ratio for insider transactions last week, according to the latest Vickers Weekly Insider Report, was 1.27-to-1.

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Resource Capital moved in late January to sell part of its Molycorp holdings as the lockup on insider transactions expired.

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Now, investing in companies based on insider transactions is not a new strategy and empirical data on the success of this type of investing is uneven.

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Legal experts said it's tough to make insider trading charges stick when the transactions aren't focused on a single event but rather occur over a period of time.

FORBES: A Glimmer Of Hope

In order to prevent the transactions from being flagged under insider-trading laws, the trades are split among hundreds, at times thousands, of small accounts.

FORBES: Japan's Dirty Secrets

Ken Lay, who sold shares of Enron back to the company in the months leading up to its bankruptcy filing, was not even charged with insider trading, perhaps because the nature of his transactions would have made it too difficult for the prosecution to prove the charge, lawyers said.

FORBES: A Glimmer Of Hope

In a whirl of transactions, the risk of sharp practice, including insider dealing, may well grow.

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Dyck and Zingales say short-sellers started tipping off selective journalists about the "related-party" transactions involving Enron's senior officers and their insider trading.

FORBES: Magazine Article