I bought some front-month SPY puts on Monday, and am surprised at how much they're dropping in value even though the market is declining each day. Yesterday morning, when SPY was at 119.27, the June 121 P was 2.45x2.50. Today, at the same point, the put is 2.35x2.40, and at 119.31 the put drops to 2.30x2.40. A VIX chart confirms this - although SPY is the same point it was Tuesday morning, VIX is down by about .50. What's going on?