From oil to interest rates, Trump has repeatedly moved markets in his direction. Whether that serves the economy is another question, columnist Greg Ip writes.

From oil to interest rates, the president has repeatedly moved markets in his direction. Whether that serves the economy is another question.

From oil to interest rates, the president has repeatedly moved markets in his direction. Whether that serves the economy is another question.

From oil to interest rates, the president has repeatedly moved markets in his direction. Whether that serves the economy is another question.