If all else fails, tweet it. The New York Stock Exchange said yesterday it is looking to social media as it tweaks procedures for finding buyers and sellers to close daily trading in certain stocks.

The exchange, a unit of NYSE Euronext, said yesterday it will use Twitter and Facebook in its hunt for investors to set closing stock prices when the existing method of spreading the word, email, fails. The move brings the old school exchange - one of the last bastions of in the flesh, open outcry stock trading - one step further into the digital world.