As you can see from this graph of the London Stock Exchange's Market Cap out on loan (%MCOL) to short investors, short interest has continued to increase in this stock since 6 - 7th September 2008. The %MCOL was 4% then and has now risen to just under 7%. The exchange was caught out last week by the insolvency of Lehman Brothers (LEH), one of its largest clients; it was joint venture partner and liquidity provider for the exchange's so-called "dark pool" anonymous trading facility.
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