President Donald Trump’s first 100 days in office are the worst for the stock market for the start of a president’s four-year term since the 1970s.

Up 54% since Trump took office, Palantir has emerged unscathed from the S&P 500’s worst start to a presidency in 51 years.

Donald Trump promised Americans a “boom like no other” if they elected him president. But based on the stock market’s performance during his first 100 days in office, it depends on what you mean by “boom.