Jeff Bezos, chief executive officer of Amazon Getty Images

The proposed uptick in shipping and mailing fees at the U.S. Postal Service could cost Amazon more than $1 billion in 2019, according to Credit Suisse, which cut its near-term estimates for operating profit on the e-commerce behemoth. "As we roll forward the sensitivity analysis to 2019, we arrive at a potential incremental Shipping Expense range of $400 million to $1.1 billion range with the assumption that 40 percent to 50 percent of U.S. packages are shipped via the Postal Service," analyst Stephen Ju wrote Monday. Modeling a number of factors including the potential increase in carrier costs, rising labor expenses as a result of Amazon's minimum wage increase and moderating shipping volume, Ju cut his 2019 pro forma earnings per share estimate by nearly 19 percent to $34.99. Amazon's stock rose 0.3 percent Monday morning. The Postal Service announced on Oct. 10 it filed notice with the Postal Regulatory Commission — the body tasked regulatory oversight of the agency — of proposed price changes to take effect Jan. 27, 2019, if approved. Postage for 1-ounce letters is expected to rise to 55 cents from 50 cents.

Meanwhile, Amazon announced earlier this month that it will be raising minimum wage for all U.S.-based employees to $15 per hour starting Nov. 1. Shares of Amazon, up 51 percent this year, have fallen off more than 10 percent since it announced the plans to buoy its minimum wage. Though met with angst on Wall Street and applause on Capitol Hill by the likes of Sen. Bernie Sanders, I-Vt., some have pointed to the advent of robotics and artificial intelligence in the workplace to ease fears of rising labor costs.

Still likes the stock