President Trump has routinely celebrated, and taken credit for, the stock market’s record-setting climb during his first year in office.

Optimism around the new tax code, as well as a relaxed regulatory climate, has helped drive the Standard & Poor’s 500-stock index’s 30 percent rise since Mr. Trump took office. But that performance falls short of the market’s gains during the first years of the presidencies of Barack Obama and the elder George Bush.

The stock market rose higher in two previous terms.

+40

%

S.& P. 500-Stock Index

Obama

Percentage change in the closes

of the first 243 trading days

of each president’s term,

compared with President

Trump’s, through

Thursday.

+33.7%

+30

H.W. Bush

+22.8%

+20

Trump

+21.2%

+10

Clinton

+7.3%

Reagan

–10

–8.7%

W. Bush

–14.7%

–20

–30

1

50

100

150

200

243

Number of trading days

+40

%

S.& P. 500-Stock Index

Obama

Percentage changes in the closes

of the first 243 trading days of each

president’s term, compared with

President Trump’s, through Friday.

+33.7%

+30

H.W. Bush

+22.8%

+20

Trump

+21.2%

+10

Clinton

+7.3%

0

Reagan

–10

–8.7%

W. Bush

–14.7%

–20

–30

1

50

100

150

200

243

Number of trading days

+40

%

S.& P. 500-Stock Index

Obama

+33.7%

Percentage changes in the closes of the first 243 trading days of each

president’s term, compared with President Trump’s, through Friday.

+30

H.W. Bush

+22.8%

+20

Trump

+21.2%

+10

Clinton

+7.3%

0

Reagan

–8.7%

–10

W. Bush

–14.7%

–20

–30

1

Number of trading days

50

100

150

200

243

+40

%

S.& P. 500-Stock Index

Obama

+33.7%

Percentage change in the closes of the

first 243 trading days of each president’s

term, compared with President

Trump’s, through Friday.

+30

H.W. Bush

+22.8%

+20

Trump

+21.2%

+10

Clinton

+7.3%

Reagan

–10

–8.7%

W. Bush

–14.7%

–20

–30

1

50

100

150

200

243

Number of trading days

Source: Thomson Reuters

Mr. Obama took office amid the financial crisis. Stocks were in a freefall and hit bottom nearly two months after his inauguration. Equities then rebounded and finished Mr. Obama’s first year up more than 30 percent.

Mr. Trump, by contrast, became president during one of the longest sustained bull markets in history, and stocks have continued to set record highs during his tenure.

This run is a continuation of one of the longest bull markets ever.

3,000

S.& P. 500-stock index

Scale is logarithmic

to show comparable

percentage changes

2,000

1,000

800

H.W. Bush

W. Bush

Trump

600

Reagan

Clinton

Obama

400

200

1981

1989

1993

2001

2009

2017

3,000

2,000

S.& P. 500-stock index

Scale is logarithmic to show

comparable percentage changes

1,000

800

600

Reagan

H.W. Bush

Clinton

W. Bush

Obama

Trump

400

200

1981

1989

1993

2001

2009

2017

3,000

2,000

S.& P. 500-stock index

Scale is logarithmic to show

comparable percentage changes

1,000

800

600

Reagan

H.W. Bush

Clinton

W. Bush

Obama

Trump

400

200

1981

1989

1993

2001

2009

2017

3,000

S.& P. 500-stock index

Scale is logarithmic to show

comparable percentage changes

2,000

1,000

800

600

Reagan

H.W. Bush

Clinton

W. Bush

Obama

Trump

400

200

1981

1989

1993

2001

2009

2017

Source: Thomson Reuters

At more than 3,200 days and counting, this nearly nine-year bull market run trails only the boom from 1987 to 2000. And the momentum suggests the market could climb further upward.

It’s unusual for any president to take credit (or blame) for stock market performance, but in Twitter posts and speeches, Mr. Trump has continually trumpeted the success of the market as a direct result of his actions.

As with any time the stock market shoots upward, the inevitable question is when it will fall, and now, what Mr. Trump will say if it does.

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