TARIFFS LATEST US, China to slash tariffs for 90 days OTC Markets EXMKT - Delayed Quote • USD OPT-Sciences Corporation (OPST) Follow Add holdings 21.50 +21.50 (0.00%) As of May 9 at 4:00:00 PM EDT. Market Open. Comparisons Indicators Technicals Corporate Events Draw List View Grid View Detach Attach No Tool Measure UNDO Redo All All Favorites Text Statistics Technicals Fibonacci Markings Lines Annotation Arrow Line Horizontal Vertical Rectangle Trend Line Measurement Line Average Line Callout Channel Check Continuous Crossline Elliott Wave Ellipse Doodle Fib Projection Fib Arc Fib Fan Fib Time Zone Focus Gann Fan Gartley Heart Pitchfork Quadrant Lines Ray Regression Line Fib Retracement Star Speed Resistance Arc Speed Resistance Line Time Cycle Tirone Levels Volume Profile Cross Magnet Clear All Drawings Restore Default Parameters Loading Chart for OPST 1D 5D 1M 3M 6M YTD 1Y 5Y All Date Range 1 min Related News View More All News Press Releases SEC Filings Ford, GM, & Stellantis; retail stocks; Shopify: Trending Tickers Stock market today: Dow gains 900 points, while S&P 500, Nasdaq surge as US-China deal spurs a rush into stocks Mag 7 rally, airline & pharmaceutical stocks: Trending Tickers S&P 500, Dow, Nasdaq skyrocket after US-China trade truce Secrets behind 'Magnificent 7' surge ahead of Nvidia earnings Why US-China tariff agreement isn’t super bullish for stocks Trump's FTC antitrust cops just got a loud warning about blocking tech tie-ups Amazon: BofA says robots/AVs could address 34% of total costs Trump Executive Order Could Reshape How Americans Pay for Drugs. Why It Isn’t Bad for Pharma Stocks. Stock Market Today: Dow Jones Soars As Bessent Says This On China; Nvidia Surges, Alibaba Clears Entry (Live Coverage) Trump Says He May Speak to Xi This Week After Tariffs Truce