* Financials climb on optimism about bank results

* Goldman posts results after hours

* Boeing weighs on Dow on profit warning

* Dow off 0.3 pct; S&P 500 up 0.3 pct, Nasdaq up 0.1 pct

* For up-to-the-minute market news click [STXNEWS/US] (Updates with Goldman's news after the bell and financial ETF price after hours in paragraph 9)

By Ellis Mnyandu

NEW YORK, April 13 (Reuters) - The S&P 500 and Nasdaq rose on Monday as bets that major banks will post reassuring quarterly results fueled a run-up in financials, offsetting uneasiness about the fate of General Motors GM.N .

The Dow, however, slipped after Boeing (BA.N: Quote, Profile, Research) said cuts in output of widebody planes and lower-than-expected airplane prices would hurt first-quarter profit, sparking caution about the economy's health and the corporate earnings season just getting under way.

Banking sector optimism followed surprisingly upbeat preliminary quarterly results from Wells Fargo (WFC.N: Quote, Profile, Research) last week.