The stock is now up over nearly 70% year to date.Shares of Palantir Technologies (PLTR 2.49%) were rallying after the company once again reported accelerating revenue growth and increased its full-year guidance.With the stock now up almost 70% year to date, let's take a closer look at the company's second-quarter results and whether it's too late to buy the stock.Growth continues to accelerateFor the fourth-consecutive quarter, Palantir saw its year-over-year revenue growth accelerate to 27%, up from just 1 ...