Wall St has risen on the back of Big Tech earnings and ahead of the Fed's rates decision. (AP PHOTO)Wall St has risen on the back of Big Tech earnings and ahead of the Fed's rates decision. The ​Fed convenes later in the day for its rate decision, with policymakers widely expected to keep it unchanged at 3.5 per cent–3.75 per cent. Texas Instruments surged six per cent after the analogue chipmaker forecast first-quarter revenue and profit above Wall Street estimates. Seagate Technology jumped ‍14.5 per cent after it forecast third-quarter revenue and profit above Wall Street expectations.