Global financial markets are experiencing increased volatility as rising bond yields and escalating tensions in the Middle East weigh heavily on investor sentiment. Nasdaq futures are sliding, while U.S. stock indices, including the Dow and S&P 500, are set to decline amid a significant bond selloff, with the yield on the U.S. 30-year Treasury reaching levels not seen in nearly two decades. Investors are reacting to indications of a deteriorating ceasefire between the U.S. and Iran, which threatens to elevate geopolitical risks beyond just oil prices. As crude oil surpasses $91 a barrel, market analysts warn that the favorable conditions for stocks driven by low bond yields may be coming to an end. Overall, many major stock indices are trending lower, reflecting growing risk aversion fueled by geopolitical instability and rising costs associated with energy and borrowing.