BLK.SW BlackRock jumps 96.87% to CHF 852.85 on SIX: valuation is the key test

BLK.SW stock surged 96.87% intraday to CHF 852.85 on SIX on 23 Feb 2026. The move followed a large gap from the prior close of CHF 433.20 and pushed the intraday high to CHF 863.90. Volume printed at 40 trades, and the price swing placed BlackRock, Inc. among the top intraday movers in the Financial Services sector on the Switzerland exchange. Traders should watch valuation metrics and next catalysts as price and volume settle.