Twitter stocks up 5% on S&P 500 inclusion even as analysts forecast decline

Twitter's 58 percent gain in 2018 would be the fifth-largest in the S&P 500

Twitter Inc. was a stock market swamp for three years after going public, saddling investors with as much as $32 billion in equity losses. It took another step Monday toward putting that era behind it.

In an action that forces index funds with trillions of dollars in assets to own it, the social media company will replace Monsanto Co. in the S&P 500 prior to the start of trading June 7. A much larger internet rags-to-riches story, Netflix Inc., was added to the S&P 100, S&P Dow Jones Indices said.

Twitter’s 58 percent gain in 2018 would be the fifth-largest in the