Complex sentence: Steven Taylor (Michael Douglas) is a Wall Street hedge fund manager who's investments and speculations allow him to live an extravagant upper class lifestyle with his much younger wife, Emily (Gwyneth Paltrow).
Split into simpler sentences: Steven Taylor (Michael Douglas) is a Wall Street hedge fund manager. His investments and speculations allow him to live an extravagant upper class lifestyle with his much younger wife, Emily (Gwyneth Paltrow).