The FTSE 100 has dipped into negative territory, having been up 0.2% earlier on Budget afternoon, Bloomberg reports. The FTSE 250 is down 0.5%, pushed lower by the housebuilders Taylor Wimpey and Persimmon.
Gilts have given back their earlier gains, according to Bloomberg, in line with European bonds and US Treasuries ahead of the Fed decision.
Investing.com, via Yahoo Finance, puts the 10-year gilt yield at 5.331% and the 2-year at 4.941%. It has sterling down 0.18% at $1.3283.
Bloomberg notes that the Budget contained the highest number of individual measures since 2010. Kallum Pickering, chief economist at Peel Hunt, told a post-Budget webinar reported by Bloomberg: "This budget is mostly inconsequential, and is constructed as such."