Sept 27 (Reuters) - Chubb Ltd
* Chubb announces preliminary loss estimates for hurricanes Harvey and Irma
* Chubb Ltd - insured losses for Hurricane Harvey are currently estimated at approximately $650 million pre-tax, or $520 million after tax
* Chubb Ltd - losses for Hurricane Irma are currently estimated to range from $800 million to $950 million pre-tax, or $640 million to $760 million after tax.
* Chubb Ltd - announced preliminary loss estimates in Q3 of 2017 attributable to Hurricanes Harvey and Irma Source text for Eikon: Further company coverage: