News provider Techcrunch says Square is looking to raise $200m.

Square, a US-based credit card reader, is reportedly preparing to raise a round at more than $200m and potentially bring in a strategic investor.

News provider Techcrunch said: "Square has raised a new large round of funding somewhere close to $200m [in valuation]. There is still no word on the finer details, but its expected that [venture capital firms] Sequoia, Khosla Venture, Benchmark and Kleiner Perkins will be associated with the round. However, it would be interesting to see…