Could there be trouble in paradise?

Walmart Stores Inc.'s  (WMT) - Get Walmart Inc. Report   shares were down more than 10% at the end of trading on Tuesday after missing Wall Street forecast for earnings in its fourth quarter.

The company also reported an earnings per share (EPS) of $1.33 compared to the projected $1.37. Same-store sales and revenue, however, beat analyst estimates. Same-store sales rose 2.6%, compared to the expected 2.2% growth rate, and revenue reached $136.3 billion to the expected $134.9 billion.

The company cited restructuring charges, impairment from discontinuing certain real estate projects and loss on extinguishment of debt as among the negative impacts on EPS the past quarter. 

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In the fourth quarter, its online sales also increased slower than previous rates: 23%, compared to 50% in its third quarter. Total sales, meanwhile, rose 4.1% from the same period last year to total $136.3 billion. 

In Walmart U.S., same-store sales rose 1.6%, while the average shopper ticket also grew 1%. 

"We're making real progress putting our unique assets to work to serve customers in all the ways they want to shop," CEO Doug McMillon said in a statement. "We're making decisions to position the business for success and investing to win with customers and shareholders."

For the entire fiscal 2017, revenue reached $500.3 billion, reflecting an increase of 3% compared to 2016. E-commerce rose 44% overall, while the company returned $14.4 billion to shareholders through stock buyback and dividends. 

Company CFO Brett Biggs said during the earnings call that the effective federal corporate tax rate for 2019 will be between 24% and 26%, due to the new tax law; before the change, Walmart's tax rate was 32.5%. He added that including the benefits of the tax change, the company expects a cash benefit of $2 billion for this year. "Our priorities for capital allocation remain unchanged," he added, offering no specifics. "We'll focus first on investing on our business and other growth initiatives."