June 16 (Reuters) - Electric-vehicle startups from Nikola NKLA.O to Lordstown Motors RIDE.O were set on Friday to extend a blistering rally in their shares that has put the cash-strapped companies on track for hefty weekly gains. The winning streak has come without any apparent news or catalyst for the companies, leading several analysts and traders to point to a potential squeeze in the highly shorted stocks. Rising interest rates and high levels of inflation have limited their access to funding at a time when efforts to ramp up production are thinning the companies' cash reserves.