(Reuters) -The twists and turns in U.S. President Donald Trump's tariff policies have not only rattled global financial markets but have also taken investors on a roller-coaster ride.

Companies are counting the cost of the trade war that is now being estimated at more than $34 billion in lost sales and higher expenses, a Reuters analysis showed.

Adding to the uncertainty are tariff-related legal challenges and Trump's assertion that he would hammer out bilateral deals with trade partners, even though agreements remain elusive, save a pact with Britain this month.

Here's a timeline for key upcoming events and dates that could have a bearing on the U.S. tariff policy:

June 5 and 9, 2025:

On May 30, the U.S. federal appeals court reinstated most of Trump's sweeping tariffs, a day after a lower court blocked the ruling. The appeals court ordered the plaintiffs in the case to respond by June 5, while the administration must respond by June 9.

June 15-17:

Trump will attend the annual summit of G7 nations in Canada. The G7 Leaders' Summit will be hosted at the Rocky Mountain resort town of Kananaskis, Alberta, with tariffs expected to be a major topic of discussion.

July 8:

"Liberation Day" tariffs to take effect following the 90-day suspension period, potentially affecting imports from multiple countries.

July 9:

Deadline for United States and the European Union to negotiate a deal to avert 50% tariff duty on all EU imports.

July 14:

The EU's 90-day pause on its own retaliatory tariffs to end.

(Reporting by Sameer Manekar in Bengaluru; editing by Arpan Varghese and Anil D'Silva)