Israeli authorities are investigating claims some investors may have known in advance about the Hamas plan to attack Israel on 7 October and used that information to make hundreds of millions of pounds.

Research by US law professors Robert Jackson Jr and Joshua Mitts, from New York University and Columbia University respectively, found significant short-selling of shares leading up to the massacre, which triggered a war that has raged for nearly two months.

“Days before the attack, traders appeared to anticipate the events to come,” the authors wrote, citing short interest in the MSCI Israel Exchange Traded Fund (ETF) they say “suddenly, and significantly, spiked” on 2 October.

“And just before the attack, short selling of Israeli securities on the Tel Aviv Stock Exchange (TASE) increased dramatically,” they added.

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The Israel Securities Authority told Reuters: “The matter is known to the authority and is under investigation by all the relevant parties.”

The researchers said short-selling prior to 7 October “exceeded the short-selling that occurred during numerous other periods of crisis”, including the recession following the financial crisis of 2008, the 2014 Israel-Gaza war and the COVID-19 pandemic.

They gave the example of Leumi, Israel’s largest bank, which saw 4.43 million new shares sold short over the 14 September to 5 October period, yielding profits of 3.2bn shekels (£680m) on that additional short-selling.

“Although we see no aggregate increase in shorting of Israeli companies on US exchanges, we do identify a sharp and
unusual increase, just before the attacks, in trading in risky short-dated options on these companies expiring just after the attacks,” they said.

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Short sellers are investors who bet on a fall in the price of a security, in this case a stock.

They typically do this by borrowing shares in a particular company and then selling them.

If the share price falls, they will then buy those shares back at the lower price, sealing in their profit.

The shares are then returned to the original investor from whom they were borrowed.

Traders ‘profited from these tragic events’

The value of the MSCI Israel ETF fell by 6.1% on 11 October, the first day the American market was open for business after the attack, and later dropped by 17.5% over the 20 days following the massacre.

The researchers – who did not name the traders – identified two large transactions on 2 October, adding: “On these two transactions alone, the trader made several million dollars in profit (or in losses avoided).”

They also identified similar patterns in April, when it was reported Hamas was initially planning its attack on Israel.

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While the researchers do not identify Hamas as being behind the trades, their paper suggests the information originated from the terror group: “Our findings suggest that traders informed about the coming attacks profited from these tragic events.”

Their paper, Trading on Terror?, was published on the Social Science Research Network (SSRN) on Sunday.

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