Downtick and Downturn

Downtick noun - A transaction in the stock market at a price below the price of the preceding transaction.

Downturn and downtick are semantically related In some cases you can use "Downturn" instead a noun "Downtick".

Downturn noun - A worsening of business or economic activity.

Downtick and downturn are semantically related in drop topic. You can use "Downtick" instead a noun "Downturn".