The stock market is overvalued, and it's not just the tech sector that appears stretched, according to JPMorgan's chief global market strategist Marko Kolanovic.The S&P 500's forward price-to-earnings ratio is currently 19.4x, and when you back out tech and AI stocks, the remaining 65% of the index trades at 17.4x, according to Kolanovic. That's not cheap, as the historical forward P/E of the index is 15.3x, meaning that current valuations represent a 10% premium. "FOMO is in full swing, there is complacency being built into stocks with VIX at the lows of its range," Kolanovic said in a Monday note....