NEW YORK Tesla has rolled out new, cheaper versions of two of its electric car models in hopes the offerings will help revive flagging sales but investors dumped its stock anyway. The new Model Y, costing just under $40,000 with a stripped-down interior, comes in a brutal year for Tesla as it tries to attract more customers despite an aging lineup, stiff competition from foreign EV makers and anti-Elon Musk boycotts targeting the company. The reaction from the stock market after the news broke