BUZZ-LSE: said to put $1.4 bln price tag on Russell Investments
** London Stock Exchange said to put Russell Investments for sale in mid-February, looking to fetch $1.4 bln, sources tell Reuters
** Russell Investments is the asset management arm of Frank Russell Co, which LSE bought last year from insurer Northwestern Mutual for $2.7 bln
** Motivation for purchase largely to expand into indexes business
** Co to run formal sales process for unit, has had informal conversations with at least 3 interested parties including CIBC
** LSE is second-best performing exchange operator globally over past year, up more than 40 pct. HKEx maintains No. 1 position, up 46 pct Chart: link.reuters.com/kur43w
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