The Spiral is nearing completion, but Tishman Speyer’s Hudson Yards tower is still looking to fill out its enormous office footprint with more tenants. London-based bank HSBC is in discussions to lease about 250,000 square feet at the development for a local headquarters, Bloomberg reported. A source familiar with the negotiations told the outlet tere is still a chance talks fall through. Tishman Speyer’s building at 66 Hudson Boulevard continues to reel in leases as