Something different is happening to the U.S. dollar, which recently completed its worst first half of any calendar year since at least the 1970s: The dollar is strengthening this week, despite President Donald Trump’s ongoing tariff talk.

The S&P 500 followed a record-breaking Thursday by dipping 0.33% Friday after President Donald Trump said he would impose a 35% tariff on Canada on August 1. The stock market dipped on Friday after President Donald Trump issued his latest tariff threat against Canada.

President Trump’s ever-swerving tariff regime has taken more sharp turns in recent days.On July 7, his administration pushed back some of its most punishing duties by three more weeks to August, following a 90-day delay.

President Donald Trump late Thursday threatened a 35% tariff on goods imported from Canada, a dramatic escalation in an on-again, off-again trade war with America’s northern neighbor and one of its most important trading partners.

Canada faces another set of tariffs in its ongoing trade talks with the U.S. However, in this latest round of tariff announcements, investors have learned to largely tune them out as negotiating bluster rather than policy commitments.

President Donald Trump’s threat to boost import taxes by 50% over Brazilian goods could drive up the cost of breakfast in the United States

CNBC's "Closing Bell" team discusses what to watch in the markets with Avery Sheffield, co-founder, CIO and senior portfolio manager at VantageRock, a long/short equity hedge fund at Rockefeller Asset Management.

Trump's tariffs have companies scrambling as they navigate cost increases. Here are the companies that have talked about hiking prices.