But buried beneath the sell-off, there may be a buying signal that has historically rewarded patient investors — if you connect the dots.NVDA stock is moving. See the chart and price action here. The signal comes from Morgan Stanley Investment Management’s Andrew Slimmon, a senior portfolio manager who recently published his latest equity commentary. To be clear, Slimmon doesn’t mention Nvidia by name. His argument is about the broader market. But it applies to Nvidia with striking relevance.The Stock-Picki ...