Updated from 7:09 a.m.
NEW YORK (TheStreet) -- Here are 10 things you should know for Friday, June 12:
1. -- U.S. stock futures were heading down on news that Greece's debt negotiations are faltering.
Asian stocks rose across the board, with Japan's Nikkei, Hong Kong's Hang Seng and the Shanghai Composite all up.
2. -- The economic calendar in the U.S. on Friday includes producer price index -- final demand at 8:30 a.m. and consumer sentiment numbers at 10 a.m.
3. -- U.S. stocks on Thursday rose modestly, extending Wednesday's rally.
4. -- Dick Costolo, the CEO of short-form social network Twitter (TWTR), said he would step down. Twitter's co-founder and chairman Jack Dorsey will become interim CEO on July 1 while remaining CEO of Square, a payments company.
Investors, including early Twitter investor Chris Sacca, have criticized the company's strategy and its communication with investors. Sacca recently explained how he thinks Twitter should revamp itself.
In premarket trading, Twitter stock was rising by 3.8%.
5. -- Greece seems closer than ever to a debt default. The nation owes the International Monetary Fund €1.6 billion ($1.8 billion) by the end of the month, but Greece needs continued lending from Europe to stay afloat. Other European nations, especially Germany, seem reluctant to extend more loans without bigger concessions and more austerity from Greece.
6. -- Americans' net worth hit a new high in aggregate -- $85 trillion. The first-quarter numbers show the impact of a rising stock market and a return of higher real estate values. The total net worth figure went up about $1.6 billion in the first three months of the year.
Greater household wealth and an improved job market are signs of a larger economic recovery.
7. -- Organic-focused grocer Whole Foods Market (WFM) announced more details about its coming subchain of stores, to be called 365 by Whole Foods Market. The stores will begin opening in 2016. The new stores will be cheaper than the famously expensive Whole Foods stores, and will have a smaller footprint.
In premarket trading, Whole Foods stock was dropping by 0.41%.