<prompt> Human: My Employer currently matches 40 of 401k contributions up to the IRS maximum. I am 25 years old, currently make 50Kyr, and contribute 36 of my weekly paycheck in order to hit 18,000. I started contributing in JAN 2015 and YTD I contributed 8500 so far, with employer matching 3500I figure since I am young and with every other option having high gross expense ratios, I placed 100 into Black Rock SP 500 stockI spoke with my father who was always on the safe side of things. He told me the stock market right now is unusually high and its just a matter of time before it drops. He told me its better if I placed 50 stocks, 50 bonds until the market stabilizesI wanted to get pf personal opinion in regard to this matterThanks!  <response>: The stock market is frequently at all time highs.The stock market will drop significantly and insignificantly in the future. It will also rise significantly and insignificantly in the future.If you think the longterm prospects are that stock market will trend upward, as it has over its history, then following your fathers advice will be costly because it will reduce your returns. 