Here are today's top news headlines fromĀ Fool.com. Check back throughout the day as this list is updated, and follow us on Twitter atĀ TMFBreaking.

Elon Musk Reveals Hyperloop Plans

Avnet Initiates Quarterly Dividend

Pioneer Natural Resources to Buy Pioneer Southwest Energy Partners for $1.5 Billion

Goldcorp Keeps Dividend Steady

Report: China Social Networking Companies See Significant Increases

Report: China Mobile Shopping Market Grows 181% YOY

Sonic Authorizes $40 Million in Share Repurchases

Ackman Quits J.C. Penney Board

Elon Musk's "Hyperloop" Elicits Excitement, Skepticism

Q&A: Ashton Kutcher Talks About Portraying Steve Jobs

DOJ Sues to Stop US Airways-American Airlines Merger

Raytheon Wins $200 Million Missile Order

Mexico Proposes End to State Oil Monopoly

Pistons Star Chauncey Billups, Junior Bridgeman Investing in Wendy's Restaurants

Retail Sales Up 0.2% for July