Close to three quarters of the nation's top 200 corporations have just reported earnings results for the 2014/15 financial year, and CommSec chief economist Craig James says they're finding it tough.

“It has been hard work for companies,” he said. The combined profits of the 143 companies that delivered annual numbers dropped by almost a third from the previous year, to $35.9 billion. Miners and energy producers have been the worst off, due to plunging commodity prices, while some retailers and…