Long-falling zinc prices cause a Pittsburgh metals producer to declare bankruptcy.
The 5.1% drop for the month and the 3.5% decline for all of 2015 has economists worried about a pullback in capital investment.
The former CEO and his investors say the offer is superior to the company's reorganization plan, setting up a possible bankruptcy court showdown.
The oil driller has a debt-for-equity swap in place with a bondholder group that will erase more than $400 million in debt from its books.
The coal company said it is delaying a $90 million interest payment to continue discussions with creditors regarding a balance sheet restructuring.
The oil and natural gas driller joins more than three dozen North American energy companies that have filed bankruptcy this year
The building materials company blamed its Chapter 11 filing on recurring operational losses.
Atna Resources has $200,000 in cash on hand and owes creditors more than $19 million.
S&P warns the speculative-grade market will be under pressure from a "near-certain" hike in interest rates.
The drug-testing lab's reorganization plan would reduce its obligations under a 2014 credit agreement to $600 million from $1.75 billion.