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* Spain to demand banks set aside $45 bln-sources

* Disney (NYSE: DIS - news) profit beats expectations

* Yahoo (NasdaqGS: YHOO - news) director to step down

* Futures off: Dow (NYSE: DPD - news) 72 pts, S&P 11.2 pts, Nasdaq (Nasdaq: ^NDX - news) 18.5 pts

NEW YORK (Frankfurt: A0DKRK - news) , May 9 (Reuters) - U.S. stock index futures fell on Wednesday, with investors again taking their cue from Europe (Chicago Options: ^REURUSD - news) as political uncertainty hung over Greece and concerns arose over the frail state of Spanish banks.

Spain will demand banks set aside another $45 billion against loans to builders as it battles to rebuild confidence, sources told Reuters. Huge bank losses have raised fears the country may need an international bailout.

U.S.-listed shares of Banco Santander SA (Amsterdam: SANT.AS - news) dropped 5.5 percent to $6.02 in premarket trading. European shares were off 1 percent early Wednesday.

The gridlock after elections in Greece has also dented sentiment. Leftist leader Alexis Tsipras was to meet the heads of Greece's mainstream parties Wednesday to try to form a coalition government, but the effort was expected to fall flat after he demanded they first agree to tear up the country's EU/IMF (Berlin: MXG1.BE - news) bailout deal.

"If Greece doesn't receive bailouts, they'll likely be expelled from the EU, and if that happens all hell could break loose over there," said Jay Feuerstein, chief executive of asset management firm 2100 Xenon Group in Chicago.

Read more from the original source:
US STOCKS-Futures down again on Europe concerns