CORRECTED - UPDATE 4-ING to post first quarterly loss, shares slump

* ING sees 500 mln euro Q3 loss

* Still assessing government capital injection plan

* Shares slump 27.5 percent to 13-year low (Corrects to make clear in paragraph 12 Barclays did not take government funding)

By Gilbert Kreijger

AMSTERDAM, Oct 17 (Reuters) - Dutch bank ING (ING.AS: Quote, Profile, Research) said it expects its first quarterly loss ever, hit by financial market turmoil and falling asset prices, sending its shares to a 13-year low.

"ING's business model is sound and our commercial performance is solid, however that does not mean that we are immune to the external environment," ING Chief Executive Michel Tilmant said in a statement on Friday.

"The crisis is far-reaching, and even the healthiest companies are feeling the negative effects."

ING said it expected to post a net loss of about 500 million euros ($674 million), its first quarterly loss since the group was formed in 1991. A spokesman said ING would still post a profit of around 2.5 billion euros for the first nine months of 2008.

ING said that third-quarter impairments on stocks and bonds, losses attributable to financial counterparties and fair value changes on property amounted to 1.6 billion euros. Loan loss provisions at the bank increased to about 400 million euros.