** Regional lender Western Alliance Bancorp's shares fall as much as 8.4%, last down 7.5% to $86.89

** Company on Thursday reported Q3 adj profit of $1.80/shr, missing est $1.89/shr - LSEG

** Q3 non-interest expense jumped to $537.4 mln from $426.2 mln

** Company expects Q4 earnings credit rate-related deposit costs to fall nearly 25% sequentially

** The bar was somewhat high coming into the earnings given WAL's recent performance - Stephens analyst Andrew Terrell

** As of last close, WAL shares up 42.8% YTD

(Reporting by Arasu Kannagi Basil in Bengaluru)

((ArasuKannagi.Basil@thomsonreuters.com))