Is the excitement surrounding chipmaker Nvidia fading? As of Monday, shares of the tech giant were down 19% since the start of 2025. Whether that's due to its high valuation, concerns about the economy, tariffs, or the possibility of a slowdown in tech spending on the horizon, investors don't appear as eager to own the stock anymore.What may surprise you is that even over the past 12 months, Nvidia stock has risen by just 20% -- a solid return but not the type investors may have been expecting from the chip ...