A flurry of announcements in the hydrogen sector has once again caused a surge in investor interest. With new plays from infrastructure giants Siemens, as well as energy giants Total and Engie, Rethink Energy’s new Hydrogen Index has now risen by 38.1% in the first two weeks of 2020 alone. Rethink launched its Hydrogen Index last week, with significant weightings in ten companies that are active in the nascent hydrogen sector, while tracking the performance of a further sixteen. The past week’s activity has seen the index’s value grow by 19.4%, adding to last week’s performance and resulting in a year to date increase of 38.1%. For the second consecutive week, this growth has been led by Plug Power (+55.2%…