Nvidia's last stock split occurred amid similar circumstances.Nvidia (NVDA 2.47%) has risen to become a nearly $1,000 stock again, which is usually a threshold where investors start to expect a stock split. While there's no hard and fast rule about when to expect a split (some companies never do), history tells us that Nvidia could be considering one now.Additionally, May 22 may be the day that one is announced, which is right around the corner. The last time Nvidia announced a stock split, the stock went w ...