Short-selling

Ticked off with the uptick rule

The US Securities and Exchange Commission revealed a revised uptick rule in February, eliminating a key exemption for options market-makers. But some participants say these new rules will impede liquidity and price efficiency in US options markets. Peter…

Protect to survive

The Lehman minibond scandal put Hong Kong firmly in the spotlight, with television images of protesting investors beamed across the world. In response, the Securities and Futures Commission (SFC) is making changes to investor protection rules. Martin…

A dynamic model for hard-to-borrow stocks

Traders with short positions in stocks that are subject to short-selling restrictions risk being 'bought in', in the sense that their positions may be closed out by the clearing firm at market prices. Marco Avellaneda and Mike Lipkin present a model for…

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