Pinterest's $320M Volume Ranks 352nd as Shares Slide 2.03% in U.S. Market

Pinterest (PINS) closed October 7, 2025, down 2.03% with a trading volume of $320 million, ranking 352nd in volume among U.S. equities. The decline followed mixed signals from the social media advertising sector amid broader market volatility. Regulatory scrutiny over data privacy practices and intensifying competition in the visual discovery space contributed to investor caution ahead of quarterly earnings.

Analysts noted that Pinterest's performance correlated with macroeconomic headwinds affecting ad-dependent tech stocks, particularly as the Federal Reserve's interest rate policy remains uncertain. Short-term momentum appears tied to execution of its AI-driven content personalization strategy, with mixed sentiment observed in third-party research reports regarding user growth sustainability.

To ensure the back-test matches your intent, could you please confirm or clarify the following points? Market universe: U.S.-listed equities only (NYSE + NASDAQ), or a different market? Re-balancing mechanics: Do we buy the 500 stocks at the next day’s open (after the ranking can be observed) and liquidate them at that day’s close, or another convention (e.g., buy at today’s close, sell at tomorrow’s close)? Portfolio weighting: Equal-weight across the 500 names, or volume- or value-weighted? Transaction costs: Should we include an estimate for commissions and/or slippage? Once I have this information, I can set up the back-test parameters and run it from 2022-01-01 to today.